Визначення слова «rachis» мовою англійська

noun

1. (obsolete, zoology, anatomy) The spinal column, or the vertebrae of the spine.

2. (zoology) An anatomical shaft or axis in a marine invertebrate.

3. (ornithology) The central shaft of a feather.

4. (botany) The axis of either a compound leaf, inflorescence, or fern frond.