rachis

ra·chis

noun \ˈrā-kəs, ˈra-\

plural ra·chis·es also ra·chi·des\ˈra-kə-ˌdēz, ˈrā-\

Definition of RACHIS

1

: an axial structure: as a (1) : the elongated axis of an inflorescence (2) : an extension of the petiole of a compound leaf that bears the leaflets b : the distal part of the shaft of a feather that bears the web

2

: spinal column

Origin of RACHIS

New Latin rachid-, rachis, from Greek rhachis; akin to Greek rhachos thorn, Lithuanian ražas dry twig, tine

First Known Use: 1785

Rhymes with RACHIS

Bacchus, Gracchus