different between rachis vs hyporachis

English

Alternative forms

• rhachis

Etymology

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

Pronunciation

• (UK, US) IPA^(key): /??e?k?s/

Noun

rachis (plural rachises or rachides)

1. (obsolete, zoology, anatomy) The spinal column, or the vertebrae of the spine. [17th-19th c.]
2. (zoology) An anatomical shaft or axis in a marine invertebrate. [from 18th c.]
3. (ornithology) The central shaft of a feather. [from 19th c.]
4. (botany) The main shaft of either a compound leaf, head of grain, or fern frond. [from 19th c.]

Usage notes

• The plural form rachides is based on a mistaken impression of the Ancient Greek stem.

Translations

References

• rachis at OneLook Dictionary Search
• rachis in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

Anagrams

• Charis, Sirach, chairs

English

Etymology

hypo- +? rachis

Noun

hyporachis (plural hyporachises)

1. (ornithology) The downy lower barbs of a feather.

Synonyms

• (downy lower barbs of a feather): afterfeather

Translations