Rachis
Definition, Meaning & Examples
Pronunciation /ˈɹeɪkɪs/ · Part of speech noun
Quick meaning: Rachis is a noun meaning (zoology) An anatomical shaft or axis in a marine invertebrate.
Meaning
(zoology) An anatomical shaft or axis in a marine invertebrate.
More Meanings
- (ornithology) The central shaft of a feather.
- (botany) The axis of either a compound leaf, inflorescence, or fern frond.
- (obsolete, zoology, anatomy) The spinal column, or the vertebrae of the spine.
Example Sentences
In some squid species, the pen rachis flares out into wings on either side, and the tip of the rachis grows into a thick cone.
Word Forms
- rachises
- rachides
Related Words
Related dictionary entries include spine, rhachis, ridge-bone, rachiometer, ribcage, rachitism.
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Sources & Attribution
FreeDictionaryAPI.com / Wiktionary · Original source · CC BY-SA 4.0
Dictionary data is provided by FreeDictionaryAPI.com and sourced from Wiktionary under its stated license.