gammarid
/ˈɡamərɪd/Zoology
noun
Any of numerous amphipods of (or formerly of) the family Gammaridae, which comprises small shrimplike crustaceans found in both fresh and sea water.
adjective
Of or relating to amphipods of (or formerly of) the family Gammaridae; designating such amphipods.
Origin
Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From scientific Latin Gammarus, genus name, specific use of classical Latin gammarus, variant of cammarus (from ancient Greek κάμμαρος, kind of crustacean, perhaps a large prawn, of unknown origin) + -id, after scientific Latin Gammaridae, family name (Leach, 1814).