The swollen, egg-containing rear segment of female ants and other insects, especially when sealed or enclosed.
From Greek 'kleistos' (closed) and 'gaster' (belly/stomach), referring to the enclosed abdominal section. Used in entomology.
An ant queen's gaster can produce tens of thousands of eggs per day, and it gets visibly distended—some ant queens are literally just a giant egg-production machine surrounded by workers caring for her every need.
Complete word intelligence in one call. Free tier — 50 lookups/day.