Rhachitomi

plural noun

Rha·​chit·​o·​mi

rəˈkitəˌmī,

raˈk-

: an order of Labyrinthodontia including most of the larger Permian amphibians and comprising forms having rhachitomous vertebrae, relatively stocky salamandriform bodies, and in some cases external gills

Word History

Etymology

New Latin, from rachi- + -tomi (from Greek tomos cut, slice)

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