prosome1
/ˈprəʊsəʊm/Zoology
noun
In free-living and some parasitic copepods: the region of the body anterior to the main articulation or point of flexure (including the head and some or all of the thoracic segments); contrasted with urosome. Also more generally: = prosoma.
Origin
Late 19th century; earliest use found in The Century Dictionary. From pro- + -some.
prosome2
/ˈprəʊsəʊm/Cell Biol.
noun
= proteasome; (occasionally also) the core unit of a proteasome, carrying the catalytic activity.
Origin
1980s. From pro- + -some. Compare proteasome.