Main Entry: in·ver·te·brate

Pronunciation: \(ˌ)in-ˈvər-tə-brət, -ˌbrāt\

Function: adjective

Etymology: New Latin invertebratus, from Latin in- + New Latin vertebratus vertebrate

Date: 1832

1 : lacking a spinal column; also : of, relating to, or concerned with invertebrate animals
2 : lacking in strength or vitality : weak

— invertebrate noun