[pro.sto.mi.um] n, pl -mia [NL, fr. Gk pro- + stoma mouth--more at stomach] (1870): the portion of the head of various worms that is situated in front of the mouth -- pro.sto.mi.al adj
PROSTOMIUM
Meaning of PROSTOMIUM in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012