different between pulvinus vs rachis

English

Etymology

Unadapted borrowing from Latin pulv?nus. Doublet of pillow.

Noun

pulvinus (plural pulvinae or pulvini)

1. (botany) A joint on a plant leaf or petiole that may swell and cause movement of the leaf or leaflet.

Further reading

• Adrian D. Bell, Plant Form (new ed.), Timber Press, 2008. ?ISBN

Latin

Etymology

From pulvis (“dust, powder”) +? -?nus (“-ine”), for the filler of a pillow.

Pronunciation

• (Classical) IPA^(key): /pul?u?i?.nus/, [p????u?i?n?s?]
• (Ecclesiastical) IPA^(key): /pul?vi.nus/, [pul?vi?nus]

Noun

pulv?nus m (genitive pulv?n?); second declension

1. cushion, pillow, bolster
2. an elevated piece of arable land; a raised bed

Declension

Second-declension noun.

Descendants

• Italian: pulvino
• Old Leonese: [Term?]
  • Asturian: povin
• ? English: pulvinus (learned)
• ? West Germanic: *pulw? (see there for further descendants)

Further reading

• pulvinus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• pulvinus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• pulvinus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• pulvinus in The Perseus Project (1999) Perseus Encyclopedia?^[1]
• pulvinus in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin

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