Third or 3rd may refer to:

Numbers

* 3rd, the ordinal form of the cardinal number 3 * , a

fraction A fraction (from , "broken") represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, thre ...

of one third * ¹⁄₆₀ of a ''second'', i.e., the third in a series of fractional parts in a sexagesimal number system

Places

* 3rd Street (disambiguation) * Third Avenue (disambiguation) * Highway 3

Music

Music theory

* Interval number of three in a musical interval **

Major third In music theory, a third is a Interval (music), musical interval encompassing three staff positions (see Interval (music)#Number, Interval number for more details), and the major third () is a third spanning four Semitone, half steps or two ...

, a third spanning four semitones **

Minor third In music theory, a minor third is a interval (music), musical interval that encompasses three half steps, or semitones. Staff notation represents the minor third as encompassing three staff positions (see: interval (music)#Number, interval numb ...

, a third encompassing three half steps, or semitones ** Neutral third, wider than a minor third but narrower than a major third ** Augmented third, an interval of five semitones ** Diminished third, produced by narrowing a minor third by a chromatic semitone * Third (chord), chord member a third above the root *

Degree (music) In music theory, the scale degree is the position of a particular note on a scale relative to the tonic—the first and main note of the scale from which each octave is assumed to begin. Degrees are useful for indicating the size of intervals ...

, three away from tonic **

Mediant In music, the mediant (''Latin'': "being in the middle") is the third scale degree () of a diatonic scale, being the note halfway between the tonic and the dominant.Benward & Saker (2003), p.32. In the movable do solfège system, the mediant no ...

, third degree of the diatonic scale **

Submediant In music, the submediant is the sixth degree () of a diatonic scale. The submediant ("lower mediant") is named thus because it is halfway between the tonic and the subdominant ("lower dominant") or because its position below the tonic is symm ...

, sixth degree of the diatonic scale – three steps below the tonic ** Chromatic mediant, chromatic relationship by thirds *

Ladder of thirds A modal frame in music is "a number of types permeating and unifying African, European, and American song" and melody., quoted in Richard Middleton (1990/2002). ''Studying Popular Music'', p. 203. Philadelphia: Open University Press. . It may ...

, similar to the circle of fifths

Albums

*'' Third/Sister Lovers'', a 1974 album by Big Star first released in 1978 * ''Third'' (Soft Machine album), 1970 * ''Third'' (Portishead album), 2008 * ''Third'' (Cait Brennan album), a 2017 album by Cait Brennan * ''3rd'' (The Rasmus EP), 1996 * ''3rd'' (The Baseball Project album), released by The Baseball Project in 2014 * ''Thirds'' (album), a 1971 album by the James Gang

Other uses

* ''Third'' (play), a 2005 work by Wendy Wasserstein *

Third (curling) In curling, a third (alternatively, vice, vice-skip or mate) is the team member who delivers the second-to-last pair of a team's stones in an end. The third is in charge of calling, strategy and directing the sweepers when the skip is delivering ...

, a curling position *Thirds, third-born children in the 1985 novel ''

Ender's Game ''Ender's Game'' is a 1985 military science fiction novel by American author Orson Scott Card. Set at an unspecified date in Earth's future, the novel presents an imperiled humankind after two conflicts with an insectoid alien species they ...

'' *''Thirds'', a 2007 play by

Jacob M. Appel Jacob M. Appel (born February 21, 1973) is an American polymath, author, bioethicist, physician, lawyer, and social critic.Nagamatsu, Sequoia "A Few Words with the Ubiquitous Jacob M. Appel" ''Prince Mincer'' Journal http://primemincer.com/ con ...

Third World The term Third World arose during the Cold War to define countries that remained non-aligned with either NATO or the Warsaw Pact. The United States, Canada, Taiwan, Japan, South Korea, the Southern Cone, NATO, Western European countries and oth ...

, economically underdeveloped nations *

Third-class degree The British undergraduate degree classification system is a grading structure used for undergraduate degrees or bachelor's degrees and integrated master's degrees in the United Kingdom. The system has been applied, sometimes with significant va ...

, a type of British undergraduate degree classification *

Third (angle) A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane (mathematics), plane angle in which one Turn (geometry), full rotation is 360 degrees. It is not an SI unit� ...