RACHIS
rachis
(noun) axis of a compound leaf or compound inflorescence
Source: WordNet® 3.1
Etymology
Noun
rachis (plural rachises or rachides)
(obsolete, zoology, anatomy) The spinal column, or the vertebrae of the spine. [17th-19th c.]
(zoology) An anatomical shaft or axis in a marine invertebrate. [from 18th c.]
(ornithology) The central shaft of a feather. [from 19th c.]
(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.
Anagrams
• Charis, Sirach, chairs
Source: Wiktionary
Ra"chis, n.; pl. E. Rachises, L. Rachides. Etym: [NL., fr. Gr.
[Written also rhachis.]
1. (Anat.)
Definition: The spine; the vertebral column.
2. (Bot. & Zoöl.)
Definition: Same as Rhachis.
Source: Webster’s Unabridged Dictionary 1913 Edition