noun (plural prostomia) see: stomach Date: 1870 the portion of the head of an annelid worm (as an earthworm) that is situated in front of the mouth, prostomial adjective
PROSTOMIUM
Meaning of PROSTOMIUM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012