英和和英

別の表記

• rhachis

語源

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

発音

• (英国発音, 米国発音) IPA: /ˈɹeɪkɪs/

名詞

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.]
   • 2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 115:

     In some squid species, the pen rachis flares out into wings on either side, and the tip of the rachis grows into a thick cone.

3. (ornithology) The central shaft of a feather. [from 19th c.]
4. (botany) The axis of either a compound leaf, inflorescence, or fern frond. [from 19th c.]

使用する際の注意点

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

派生語

参照

• “rachis”, in OneLook Dictionary Search.
• William Dwight Whitney, Benjamin Eli Smith, editors (1895–1910), “rachis”, in The Century Dictionary and Cyclopedia: […], New York, N.Y.: The Century Co., →OCLC.

アナグラム

• Charis, Sirach, chairs

語形変化

Third-declension noun (i-stem).