Gemma can refer to:

Physical and Life Sciences

• A traditional name for the star Alpha Coronae Borealis.
• A gemma, an asexual reproductive structure in plants and fungi.
• A genus of clam (Gemma) in the family Veneridae; see amethyst gem clam.

The Pleiades, an open cluster of stars in the constellation of Taurus. ... Alpha Coronae Borealis (α CrB / α Coronae Borealis) is a binary star in the constellation Corona Borealis. ... A gemma is a small asexual reproductive structure in plants that detaches from the parent and develops into a new individual. ... Divisions Green algae Chlorophyta Charophyta Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants... Divisions Chytridiomycota Zygomycota Ascomycota Basidiomycota The Fungi (singular: fungus) are a large group of organisms ranked as a kingdom within the Domain Eukaryota. ... Genera see text The Veneridae or venerids are a family of marine bivalve molluscs. ... Binomial name Gemma gemma Totten, 1834 Synonyms Gemma purpurea Lea, 1842 The amethyst gem clam (Gemma gemma) is one of the smallest known species of clam, reaching length of only 5 mm [1]. It is native to the Atlantic coast of North America, from Labrador to Texas [2], but is...

Arts

• Gemma Frisius (1508-1555) was a Frisian mathematician, cartographer and instrument maker.
• Cornelius Gemma, author of the Ars Cyclognomica (1569)
• Giuliano Gemma (1938-), Italian actor, also known from several Spaghetti Westerns as Montgomery Wood
• A female given name, from Italian origin, relatively popular in Spain (written as either Gemma or Gema), Italy and the United Kingdom.
• The name of one of the characters in the children's Hospital Radio series "The Space Gypsy Adventures", narrated by John Leeson.
• An Australian musician.
• Gemma of Syr, Princess of Ossetia, is a fictional character in Melanie Rawn's Dragon Prince series.

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