Definition of Rhachis

1. n. The spine.

Definition of Rhachis

1. Noun. (alternative spelling of rachis) ¹

¹ Source: wiktionary.com

Definition of Rhachis

1. rachis [n -CHISES or -CHIDES] - See also: rachis

Medical Definition of Rhachis

1. Origin: See Rachis Alternative forms: rechis. 1. The spine. 2. The continued stem or midrib of a pinnately compound leaf, as in a rose leaf or a fern. The principal axis in a raceme, spike, panicle, or corymb. 3. The shaft of a feather. The rhachis of the after-shaft, or plumule, is called the hyporhachis. The central cord in the stem of a crinoid. The median part of the radula of a mollusk. A central cord of the ovary of nematodes. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Rhachis

rhabdosphincter
rhabdoviridae infections
rhabdovirus
rhabdoviruses
rhabdus
rhabduses
rhachi-
rhachialgia
rhachides
rhachidian
rhachiglossa
rhachilla
rhachillae
rhachillas
rhachiodont
rhachis (current term)
rhachises
rhachitis
rhachitomous
rhadamanthine
rhadinovirus
rhadinoviruses
rhaetizite
rhagade
rhagades
rhagadiform
rhagamanthus
rhagiocrine cell
rhaita
rhaitas

Literary usage of Rhachis

Below you will find example usage of this term as found in modern and/or classical literature:

1. Structural Botany: Or Organography on the Basis of Morphology. To which is by Asa Gray (1879)
"rhachis (backbone) is a name given to the axis s ^ of inflorescence; that Is"," the continuation of the stein "or" peduncle through a somewhat elongated ..."

2. Gray's Botanical Text-book by Asa Gray (1879)
"prolongation, the rhachis, which answers to the midrib of a pin- nately veined simple leaf. There arc three principal sorts, and some subordinate ones. ..."

3. Flora australiensis: a description of the plants of the Australian territory. by George Bentham, Ferdinand von Mueller (1878)
"Spikelets rather numerous, linear-terete almost closely appressed to the rhachis, obtuse or scarcely acute, with a green flowered, the rhachis bordered by ..."

4. Manual of the Botany of the Northern United States: Including the District by Asa Gray (1868)
"Smooth, except sonic bristly-chaffy hairs on the midribs and especially on the dark-purple and polished stalk ami rhachis. G'- 15' high ; frond coriaceous, ..."

5. Gray's New Manual of Botany: A Handbook of the Flowering Plants and Ferns of by Asa Gray, Benjamin Lincoln Robinson, Merritt Lyndon Fernald (1908)
"Spikelets all alike, plano-convex, sessile or nearly so, solitary or In pairs In 3 rows on one side of a flattened rhachis; first glume obsolete (rarely ..."

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