Definition of rachitomous in English:

rachitomous

Pronunciation /reɪˈkɪtəməs/

adjective

  • Designating vertebrae consisting of articulated rather than fused pieces; having such vertebrae, temnospondylous; specifically of or relating to the suborder Rhachitomi of labyrinthodont amphibians, known from fossils of the Carboniferous, Permian, and Triassic periods.

Origin

Late 19th century; earliest use found in Edward Cope (1840–1897). After scientific Latin Rhachitomus, former genus name of a fossil amphibian later identified with the genus Eryops; compare also scientific Latin Rhachitomi, suborder name.