Gemma

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

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 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 (language model), family of models developed by Google
 * Gemma, one of the three traditional names for the binary star Alpha Coronae Borealis
 * Gemma, an Arduino-compatible microcontroller designed by Limor Fried

Ships

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

Other uses

 * Gemma (organisation), an English organization for disabled lesbians