Lexic.us

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

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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