Gemma or GEMMA may refer to:

People and fictional characters

* Gemma (given name), includes a list of people and fictional characters with the name * Gemma (surname), includes a list of people with the name

Science and technology

Biology

* Gemma (botany), an asexual reproductive structure in plants and fungi * A monotypic genus of the Veneridae family of saltwater clams ** '' Gemma gemma'', 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 em ...

'' genus

Other uses in science and technology

* Walter Gemma, a radial aero engine manufactured by Walter Aircraft Engines in the early 1930 * Gas phase electrophoretic molecular mobility analysis (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 t ...

* Gemma, an Arduino-compatible microcontroller designed by Limor Fried

Ships

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

Other uses