Rachis

noun

/ˈɹeɪkɪs/

Word Frequency: 0.1

Definitions

1.nounThe spinal column, or the vertebrae of the spine.

2.nounAn anatomical shaft or axis in a marine invertebrate.

3.nounThe central shaft of a feather.

4.nounThe main shaft of either a compound leaf, head of grain, or fern frond.

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