English Explanatory Dictionary

rachis

English dictionary entry

Meanings

noun
  1. The spinal column, or the vertebrae of the spine.
  2. An anatomical shaft or axis in a marine invertebrate.
  3. The central shaft of a feather.
  4. The axis of either a compound leaf, inflorescence, or fern frond.

Pronunciation

/ˈɹeɪkɪs/ LL-Q1860 (eng)-Vealhurl-rachis.wav

Word forms

rachis rachises rachides rhachis

Etymology

From New Latin rachis, from Ancient Greek ῥάχις (rhákhis, “spine, ridge”).

Derived words

hyporachis rachi- rachidian rhachi- rhachidian
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