We found 2 dictionaries that define the word tocostome:

General (2 matching dictionaries)

1. tocostome: Merriam-Webster
2. tocostome: Wiktionary

Definitions from Wiktionary (tocostome) ▸ noun:  (zoology) An egg-laying orifice. ▸ Words similar to tocostome ▸ Usage examples for tocostome ▸ Idioms related to tocostome ▸ Wikipedia articles (New!) ▸ Popular adjectives describing tocostome ▸ Words that often appear near tocostome ▸ Rhymes of tocostome ▸ Invented words related to tocostome