Valid in these dictionaries
Meaning of ‘rhachis’
3 definitions found.
(Anat.) The spine.
(Bot.) (a) The continued stem or midrib of a pinnately compound leaf, as in a rose leaf or a fern. (b) The principal axis in a raceme, spike, panicle, or corymb.
(Zoöl.) (a) The shaft of a feather. The rhachis of the after-shaft, or plumule, is called the hyporhachis. (b) The central cord in the stem of a crinoid. (c) The median part of the radula of a mollusk. (d) A central cord of the ovary of nematodes.
Source: WordNet 3.0 Copyright 2006 by Princeton University
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