[ 'prəʊtə(ʊ)stəʊm ]
■ noun Zoology an organism whose mouth develops from a primary embryonic opening, such as an annelid, mollusc, or arthropod. Compare with deuterostome .
Origin
1950s: from proto- + Gk stoma 'mouth'.
[ 'prəʊtə(ʊ)stəʊm ]
■ noun Zoology an organism whose mouth develops from a primary embryonic opening, such as an annelid, mollusc, or arthropod. Compare with deuterostome .
Origin
1950s: from proto- + Gk stoma 'mouth'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004