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Definition of Rachis
1. Noun. Axis of a compound leaf or compound inflorescence.
2. Noun. The series of vertebrae forming the axis of the skeleton and protecting the spinal cord. "The fall broke his back"
Specialized synonyms: Notochord, Chine
Terms within: Canalis Vertebralis, Spinal Canal, Vertebral Canal, Coccyx, Tail Bone, Vertebra, Intervertebral Disc, Intervertebral Disk
Generic synonyms: Skeletal Structure
Group relationships: Axial Skeleton
Derivative terms: Spinal
Definition of Rachis
1. n. The spine; the vertebral column.
Definition of Rachis
1. Noun. (botany) The main shaft of either a compound leaf, head of grain, or fern frond. ¹
2. Noun. (zoology anatomy) The spine or the vertebrae of the spine. ¹
3. Noun. (ornithology) The central shaft of a feather. ¹
¹ Source: wiktionary.com
Definition of Rachis
1. the spinal column [n -CHISES or -CHIDES] : RACHIAL [adj]
Medical Definition of Rachis
1. The main stem of an inflorescence or a pinnate leaf. (09 Oct 1997)
Lexicographical Neighbors of Rachis
Literary usage of Rachis
Below you will find example usage of this term as found in modern and/or classical literature:
1. Cyclopedia of American Horticulture: Comprising Suggestions for Cultivation by Liberty Hyde Bailey, Wilhelm Miller (1900)
"Tall tree : Ivs. with downy rachis ; pinnae 6-14, each with 16-50 leaflets, ...
Tall tree : young branches with large, persistent stipules: rachis of the ..."
2. Bulletin by United States Bureau of Plant Industry, Division of Plant Industry, Queensland (1910)
"A fragile rachis was undoubtedly one of the characters of this wild prototype.
... All agronomists and all botanists regard a rigid rachis as an acquired ..."
3. History of the City of Rome in the Middle Ages by Ferdinand Gregorovius, Annie Hamilton, Irving Stone (1894)
"The accession of rachis, as well as the fall of his predecessor, were alike due
to the exercise of papal diplomacy.1 2. CONTINUED RECOGNITION OF THE ..."
4. Essays on Wheat: Including the Discovery and Introduction of Marquis Wheat by Arthur Henry Reginald Buller (1919)
"In wheat, on the contrary, naked grains and a rigid rachis are the general ...
Cultivated Wheats with a Brittle rachis " Among the known cultivated wheats ..."
5. Manual of Botany for North America: Containing Generic and Specific by Amos Eaton (1836)
"... lower side wedge-form at the base; the upper fruit bearing ones smaller: stipe
and rachis chaffy: fruit-dots solitary, but at length becoming confluent. ..."
6. History of the City of Rome in the Middle Ages by Ferdinand Gregorovius (1894)
"The accession of rachis, as well as the fall of his predecessor, were alike due
to the exercise of papal diplomacy.1 2. CONTINUED RECOGNITION OF THE ..."
7. The Natural History of Plants: Their Forms, Growth, Reproduction, and by Anton Kerner von Marilaun, Francis Wall Oliver, Mary Frances (Ewart) Macdonald, Marian (Balfour) Busk (1895)
"The erect, fleshy, white, or reddish rachis bearing the flowers then becomes
visible. The female flowers are Fig. 41. ..."
8. History of the City of Rome in the Middle Ages by Ferdinand Adolf Gregorovius (1894)
"The accession of rachis, as well as the fall of his predecessor, were alike due
to the exercise of papal diplomacy.1 2. CONTINUED RECOGNITION OF THE ..."
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