Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

rachis

play
noun ra·chis \ˈrā-kəs, ˈra-\

Definition of rachis

plural

rachises

also

rachides

play \ˈra-kə-ˌdēz, ˈrā-\
  1. 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. 2 :  spinal column



Origin and Etymology 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


Seen and Heard

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

WORD OF THE DAY

airtight or solitary

Get Word of the Day daily email!