Gemma or GEMMA may refer to:

People and fictional characters

Gemma (given name) Gemma is an Italian female name, of Latin origin, meaning "gem" or " precious stone". People with the given name Female * Gemma Arterton (born 1986), English actress * Gemma Atkinson (born 1984), English actress and model * Gemma Beadsworth ...

, includes a list of people and fictional characters with the name *

Gemma (surname) Gemma is a surname. Notable people with the name include: * Alfred A. Gemma (born 1939), American politician * Andrea Gemma (1931–2019), Italian Roman Catholic bishop * Chiara Maria Gemma (born 1968), Italian politician * Cornelius Gemma (1535– ...

, includes a list of people with the name

Science and technology

Biology

Gemma (botany) A gemma (plural ''gemmae'') is a single cell, or a mass of cells, or a modified bud of tissue, that detaches from the parent and develops into a new individual. This type of asexual reproduction is referred to as fragmentation. It is a means of ...

, an asexual reproductive structure in plants and fungi * A monotypic genus of the

Veneridae The Veneridae or venerids, common name: Venus clams, are a very large family of minute to large, saltwater clams, marine bivalve molluscs. Over 500 living species of venerid bivalves are known, most of which are edible, and many of which are ex ...

family of saltwater clams ** ''

Gemma gemma The amethyst gem clam (''Gemma gemma'') is species of very small saltwater clam, a marine bivalve mollusk in the family Veneridae, the Venus clams. It is a small species, reaching a length of only 5 mm. The shell color is whitish or grayi ...

'', the type species * A bud-like appendage in ants of the ''

Diacamma ''Diacamma'' is a genus of queenless ants belonging to the subfamily Ponerinae. It is distributed from India to Australia and contains about 24 species. Biology A queen caste does not exist in ''Diacamma''. Unique to this genus, all workers ...

'' genus

Other uses in science and technology

Walter Gemma The Walter Gemma was a Czechoslovakian nine-cylinder, air-cooled, radial aero engine that was developed and manufactured in the early 1930s by Walter Aircraft Engines. Applications *Nuri Demirağ Nu D.36 *Praga E-39 Engines on display A pres ...

, a radial aero engine manufactured by Walter Aircraft Engines in the early 1930 *

Gas phase electrophoretic molecular mobility analysis Gas phase electrophoretic molecular mobility analysis (GEMMA) is a method for chemical analysis in which nanoflow electrospray ionization creates highly charged ions from macromolecules that are charge reduced and separated in a differential mobili ...

(GEMMA), a chemical analysis technique * Gemma, the traditional name for the binary star

Alpha Coronae Borealis Alpha Coronae Borealis (α Coronae Borealis, abbreviated Alpha CrB, α CrB), officially named Alphecca , is an eclipsing binary star in the constellation of Corona Borealis. It is located about 75 light years from the Sun and contains ...

* Gemma, an Arduino-compatible microcontroller designed by

Limor Fried Limor Fried is an American electrical engineer and owner of the electronics hobbyist company Adafruit Industries. She is influential in the open-source hardware community, having participated in the first Open Source Hardware Summit and the dra ...

Ships

* Italian submarine ''Gemma'' * , a Dutch coastal tanker lost in 1951 * , a German cargo ship in service during 1928

Other uses

Gemma (organisation) ''GEMMA'' is a magazine and a social group founded in 1976 whose mandate is to provide a "friendship and support group for disabled lesbians in England". The organisation was founded by members of lesbian organisation Sappho and mixed organisat ...