Origin of prostomiumModL: see pro-, stoma, and -ium
Origin of prostomiumNew Latin from Greek prostomion mouth, lips pro- in front of ; see pro- 2. stoma mouth
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
From Ancient Greek, meaning "before the mouth".