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Consumer Symbol
Many (but not all) graphemes that are part of a writing system that encodes a full spoken language are included in the Unicode standard, which also includes graphical symbols. See: * Language code * List of Unicode characters * List of writing systems * Punctuation * List of typographical symbols and punctuation marks The remainder of this list focuses on graphemes not part of spoken language-encoding systems. Basic communication * — No symbol * Character * Circled dot * Emoji ** ☺ — Smiley * ✓ — checkmark (UK: tick) * Harvey balls * ☆ — Star (polygon) * I - signal * 0 - lack of signal, example: Scientific and engineering symbols * Alchemical symbols * Astronomical symbols ** Planet symbols * Chemical symbols * Electronic symbol (for circuit diagrams, etc.) * Engineering drawing symbols * Energy Systems Language * Hazard symbols * List of mathematical constants (typically letters and compound symbols) * Glossary of mathematical symbols * List of physical co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grapheme
In linguistics, a grapheme is the smallest functional unit of a writing system. The word ''grapheme'' is derived from Ancient Greek ('write'), and the suffix ''-eme'' by analogy with ''phoneme'' and other emic units. The study of graphemes is called '' graphemics''. The concept of graphemes is abstract and similar to the notion in computing of a character. (A specific geometric shape that represents any particular grapheme in a given typeface is called a glyph.) Conceptualization There are two main opposing grapheme concepts. In the so-called ''referential conception'', graphemes are interpreted as the smallest units of writing that correspond with sounds (more accurately phonemes). In this concept, the ''sh'' in the written English word ''shake'' would be a grapheme because it represents the phoneme /ʃ/. This referential concept is linked to the ''dependency hypothesis'' that claims that writing merely depicts speech. By contrast, the ''analogical concept'' defines gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Symbols
Astronomical symbols are abstract pictorial symbols used to represent astronomical objects, theoretical constructs and observational events in European astronomy. The earliest forms of these symbols appear in Greek papyrus texts of late antiquity. The Byzantine codices in which many Greek papyrus texts were preserved continued and extended the inventory of astronomical symbols. New symbols have been invented to represent many planets and minor planets discovered in the 18th to the 21st centuries. These symbols were once commonly used by professional astronomers, amateur astronomers, alchemists, and astrologers. While they are still commonly used in almanacs and astrological publications, their occurrence in published research and texts on astronomy is relatively infrequent, with some exceptions such as the Sun and Earth symbols appearing in astronomical constants, and certain zodiacal signs used to represent the solstices and equinoxes. Unicode has encoded many of these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Currency Sign
A currency symbol or currency sign is a graphic symbol used to denote a currency unit. Usually it is defined by a monetary authority, such as the national central bank for the currency concerned. A symbol may be positioned in various ways, according to national convention: before, between or after the numeric amounts: , and . Symbols are neither defined nor listed by international standard ISO 4217, which only assigns three-letter codes. Usage When writing currency amounts, the location of the symbol varies by language. For currencies in English-speaking countries and in most of Latin America, the symbol is placed before the amount, as in . In most other countries, including many in Europe and Canada (when using French), the symbol is placed after the amount, as in . Exceptionally, the symbol for the Cape Verdean escudo (like the Portuguese escudo, to which it was formerly currency peg, pegged) is placed in the decimal separator position, as in . [BCV's most recent coin issue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caduceus As A Symbol Of Medicine
The caduceus is the traditional symbol of Hermes and features two snakes winding around an often winged staff. Ancient sources associate Hermes with a variety of attributes, including wisdom, trade, deception, thievery, eloquence, negotiation, and alchemy. Nevertheless it is often used as a symbol of medicine, especially in the United States. The modern use of the caduceus as a symbol of medicine became established in the United States in the late 19th and early 20th century as a result of well-documented mistakes and misunderstandings of symbology and classical culture. Critics of this practice say that the correct symbol for medicine is the Rod of Asclepius, which has only one snake and no wings. Early use in a possible medical context Before the ancient Romans and Greeks (about 2612 BCE), older representations from Syria and India of sticks and animals looking like serpents or worms are interpreted by some as a direct representation of traditional treatment of ''dracunculi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rod Of Asclepius
In Greek mythology, the Rod of Asclepius (⚕; , , , sometimes also spelled Asklepios), also known as the Staff of Aesculapius and as the asklepian, is a serpent-entwined rod wielded by the Greek god Asclepius, a deity associated with healing and medicine. In modern times, it is the predominant symbol for medicine and health care, although it is sometimes confused with the similar caduceus, which has two snakes and a pair of wings. Greek mythology and Greek society The Rod of Asclepius takes its name from the Greek god Asclepius, a deity associated with healing and medicinal arts in ancient Greek religion and mythology. Asclepius' attributes, the snake and the staff, sometimes depicted separately in antiquity, are combined in this symbol. The most famous temple of Asclepius was at Epidaurus in north-eastern Peloponnese. Another famous healing temple (or asclepeion) was located on the island of Kos, where Hippocrates, the legendary "father of medicine", may have begun his c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Common Physics Notations
This is a list of common physical constants and variables, and their notations. Note that bold text indicates that the quantity is a vector. Latin characters Greek characters Other characters See also * List of letters used in mathematics and science * Glossary of mathematical symbols * List of mathematical uses of Latin letters * Greek letters used in mathematics, science, and engineering * Physical constant * Physical quantity * International System of Units * ISO 31 ISO 31 (Physical quantity, Quantities and Physical unit, units, International Organization for Standardization, 1992) is a superseded international standard concerning physical quantities, units of measurement, their interrelationships and their pr ... References * * {{DEFAULTSORT:List Of Common Physics Notations Common Physics Abbreviations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Physical Constants
The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured. Many of these are redundant, in the sense that they obey a known relationship with other physical constants and can be determined from them. Table of physical constants Uncertainties While the values of the physical constants are independent of the system of units in use, each uncertainty as stated reflects our lack of knowledge of the corresponding value as expressed in SI units, and is strongly dependent on how those units are defined. For example, the atomic mass constant m_ is exactly known when expressed using the dalton (its value is exactly 1 Da), but the kilogram is not exactly known when using these units, the opposite of when expressing the same quantities using the kilogram. Technical constants Some of these const ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glossary Of Mathematical Symbols
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula or a mathematical expression. More formally, a ''mathematical symbol'' is any grapheme used in mathematical formulas and expressions. As formulas and expressions are entirely constituted with symbols of various types, many symbols are needed for expressing all mathematics. The most basic symbols are the decimal digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), and the letters of the Latin alphabet. The decimal digits are used for representing numbers through the Hindu–Arabic numeral system. Historically, upper-case letters were used for representing points in geometry, and lower-case letters were used for variables and constants. Letters are used for representing many other types of mathematical object. As the number of these types has increased ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Mathematical Constants
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. For example, the constant π may be defined as the ratio of the length of a circle's circumference to its diameter. The following list includes a decimal expansion and set containing each number, ordered by year of discovery. The column headings may be clicked to sort the table alphabetically, by decimal value, or by set. Explanations of the symbols in the right hand column can be found by clicking on them. List {, class="wikitable sortable sticky-header sort-under" , - ! rowspan="2" , Name ! rowspan="2" , Symbol ! rowspan="2" , Decimal expansion ! rowspan="2" , Formula ! rowspan="2" , Year ! colspan="3" , Set , - ! \mathbb{Q} ! \mathbb{A} ! \mathcal{P} , - , One , 1 , 1 , Multiplicative identity of \mathbb{C}. , data-sort-value= ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hazard Symbol
Hazard symbols are universally recognized Symbol, symbols designed to alert individuals to the presence of Hazard, hazardous or dangerous materials, locations, or conditions. These include risks associated with Electromagnetic field, electromagnetic fields, Electrical injury, electric currents, toxic chemicals, Explosive, explosive substances, and Radioactivity, radioactive materials. Their design and use are often governed by laws and standards organizations to ensure clarity and consistency. Hazard symbols may vary in color, background, borders, or accompanying text to indicate specific dangers and levels of risk, such as toxicity classes. These symbols provide a quick, universally understandable visual warning that transcends language barriers, making them more effective than text-based warnings in many situations. List of standardized hazard symbol systems Examples of common symbols Tape with yellow and black diagonal stripes is commonly used as a generic hazard warni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engineering Drawing Symbols
Engineering drawing abbreviations and symbols are used to communicate and detail the characteristics of an engineering drawing. This list includes abbreviations common to the vocabulary of people who work with engineering drawings in the manufacture and inspection of parts and assemblies. Technical standards exist to provide glossaries of abbreviations, acronyms, and symbols that may be found on engineering drawings. Many corporations have such standards, which define some terms and symbols specific to them; on the national and international level, ASME standard Y14.38. and ISO_128, ISO 128 are two of the standards. The ISO standard is also approved without modifications as European Standard EN ISO 123, which in turn is valid in many national standards. Australia utilises the Technical Drawing standards AS1100.101 (General Principals), AS1100-201 (Mechanical Engineering Drawing) and AS1100-301 (Structural Engineering Drawing). See also *Geometric dimensioning and tolerancin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
