noun, plural ra·chis·es, rach·i·des [rak-i-deez, rey-ki-]. /ˈræk ɪˌdiz, ˈreɪ kɪ-/.
- the axis of an inflorescence when somewhat elongated, as in a raceme.
- (in a pinnately compound leaf or frond) the prolongation of the petiole along which the leaflets are disposed.
- any of various axial structures.
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Origin of rachis
OTHER WORDS FROM rachisra·chid·i·an [ruh-kid-ee-uhn], /rəˈkɪd i ən/, ra·chi·al [rey-kee-uhl], /ˈreɪ ki əl/, ra·chid·i·al, adjective
Words nearby rachis
Example sentences from the Web for rachis
The pinnules are from a line to two lines long, and are adnate to the secondary rachis by a more or less decurrent base.Beautiful Ferns|Daniel Cady Eaton
The stipes is somewhat longer than the rachis, and it is of a whity-green colour.How to Know the Ferns|S. Leonard Bastin
A simple inflorescence of flowers on pedicels of equal length arranged on a common, elongated axis (rachis).
A simple inflorescence of sessile flowers arranged on a common, elongated axis (rachis).
Under these conditions the midvein is called the rachis (a), and the divisions are called the pinn (b).How to Know the Ferns|Frances Theodora Parsons