in·ver·te·brate
noun/ɪnˈvɜːtɪbrət/
/ɪnˈvɜːrtɪbrət/
(specialist)- any animal with no backbone, for example a worm
无脊椎动物 Word Originearly 19th cent. (as a noun): from modern Latin invertebrata (plural) ‘the invertebrates’ (former taxonomic group), from French invertébrés, from in- ‘without’ + Latin vertebra (from vertere ‘to turn’).