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

Definition of RACHIS

:  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

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


Next Word in the Dictionary: rachitic
Previous Word in the Dictionary: rachion
All Words Near: rachis

Seen & Heard

What made you want to look up rachis? Please tell us where you read or heard it (including the quote, if possible).