ˌklīstəˈgastrə, ˌklis- noun plural
Usage: capitalized
Etymology: New Latin, from cleist- + -gastra (from Greek gastr-, gastēr belly)
: a suborder of Hymenoptera including the ants, typical wasps, and bees, all having a legless grub as larva and a constricted second abdominal segment that forms a narrow waist or petiole — compare chalastrogastra