rachis

or rha·chis

[ rey-kis ]

/ ˈreɪ kɪs /

SEE SYNONYMS FOR rachis ON THESAURUS.COM

noun, plural ra·chis·es, rach·i·des [rak-i-deez, rey-ki-]. /ˈræk ɪˌdiz, ˈreɪ kɪ-/.

Botany.

the axis of an inflorescence when somewhat elongated, as in a raceme.
(in a pinnately compound leaf or frond) the prolongation of the petiole along which the leaflets are disposed.
any of various axial structures.

Ornithology. the part of the shaft of a feather bearing the web.

Anatomy. spinal column.

Origin of rachis

1775–85; <New Latin <Greek rháchis spine, ridge, backbone

OTHER WORDS FROM rachis

ra·chid·i·an

[ruh-kid-ee-uhn], /rəˈkɪd i ən/, ra·chi·al

[rey-kee-uhl], /ˈreɪ ki əl/, ra·chid·i·al, adjective

Words nearby rachis

rachilysis, rachio-, rachiocentesis, rachiometer, rachiotomy, rachis, rachischisis, rachitic pelvis, rachitic rosary, rachitis, rachitogenic

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for rachis

The outline of the leafy part is triangular in form, and on either side of the rachis are the tapering pinnæ.
How to Know the Ferns|S. Leonard Bastin
Meanwhile the Pope has persuaded the Lombard king Rachis to go into a monastery.
The Roman and the Teuton|Charles Kingsley
They are attached to the rachis by a very short and slender stalk.
Beautiful Ferns|Daniel Cady Eaton
Having two to many distinct blades on a common leafstalk or rachis.
Handbook of the Trees of New England|Lorin Low Dame

The wing along the rachis formed by the basal segments of the pinn seems to me more conspicuous in the latter than in the former.
How to Know the Ferns|Frances Theodora Parsons

British Dictionary definitions for rachis

rachis

rhachis

/ (ˈreɪkɪs) /

noun plural rachises, rhachises, rachides or rhachides (ˈrækɪˌdiːz, ˈreɪ-)

botany the main axis or stem of an inflorescence or compound leaf

ornithol the shaft of a feather, esp the part that carries the barbs

another name for spinal column

Derived forms of rachis

rachial or rhachial (ˈreɪkɪəl) or rachidial or rhachidial (rəˈkɪdɪəl), adjective

Word Origin for rachis

C17: via New Latin from Greek rhakhis ridge

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for rachis

rachis

[ rā′kĭs ]

n. pl. ra•chis•es

spinal column

Scientific definitions for rachis

rachis

[ rā′kĭs ]

Plural rachises rachides (răk′ĭ-dēz′, rā′kĭ-)

A main axis or shaft, such as the main stem of an inflorescence, the stalk of a pinnately compound leaf, the shaft of a feather, or the spinal column.

单词	rachis
释义	rachis or rha·chis [ rey-kis ] / ˈreɪ kɪs / SEE SYNONYMS FOR rachis ON THESAURUS.COM noun, plural ra·chis·es, rach·i·des [rak-i-deez, rey-ki-]. /ˈræk ɪˌdiz, ˈreɪ kɪ-/. Botany. the axis of an inflorescence when somewhat elongated, as in a raceme. (in a pinnately compound leaf or frond) the prolongation of the petiole along which the leaflets are disposed. any of various axial structures. Ornithology. the part of the shaft of a feather bearing the web. Anatomy. spinal column. Origin of rachis 1775–85; <New Latin <Greek rháchis spine, ridge, backbone OTHER WORDS FROM rachis ra·chid·i·an [ruh-kid-ee-uhn], /rəˈkɪd i ən/, ra·chi·al [rey-kee-uhl], /ˈreɪ ki əl/, ra·chid·i·al, adjective Words nearby rachis rachilysis, rachio-, rachiocentesis, rachiometer, rachiotomy, rachis, rachischisis, rachitic pelvis, rachitic rosary, rachitis, rachitogenic Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for rachis The outline of the leafy part is triangular in form, and on either side of the rachis are the tapering pinnæ. How to Know the Ferns\|S. Leonard Bastin Meanwhile the Pope has persuaded the Lombard king Rachis to go into a monastery. The Roman and the Teuton\|Charles Kingsley They are attached to the rachis by a very short and slender stalk. Beautiful Ferns\|Daniel Cady Eaton Having two to many distinct blades on a common leafstalk or rachis. Handbook of the Trees of New England\|Lorin Low Dame The wing along the rachis formed by the basal segments of the pinn seems to me more conspicuous in the latter than in the former. How to Know the Ferns\|Frances Theodora Parsons British Dictionary definitions for rachis rachis rhachis / (ˈreɪkɪs) / noun plural rachises, rhachises, rachides or rhachides (ˈrækɪˌdiːz, ˈreɪ-) botany the main axis or stem of an inflorescence or compound leaf ornithol the shaft of a feather, esp the part that carries the barbs another name for spinal column Derived forms of rachis rachial or rhachial (ˈreɪkɪəl) or rachidial or rhachidial (rəˈkɪdɪəl), adjective Word Origin for rachis C17: via New Latin from Greek rhakhis ridge Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Words related to rachis vertebrae, bone, ridge, back, chine, shaft, pin, rod, stem, stalk, axle, axis, mandrel, baluster, spinal column, vertebral column, backbone, spine, myel, rhachis Medical definitions for rachis rachis [ rā′kĭs ] n. pl. ra•chis•es spinal column The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for rachis rachis [ rā′kĭs ] Plural rachises rachides (răk′ĭ-dēz′, rā′kĭ-) A main axis or shaft, such as the main stem of an inflorescence, the stalk of a pinnately compound leaf, the shaft of a feather, or the spinal column. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
随便看	stalling angle stallion stalwart stalworth stamba stambul stamen stamen blight stamford stamford bridge stamin stamina staminal staminate stamini- staminiferous staminode staminodium staminody stamitz stammel stammer stamnos stamp stamp act

rachis

or rha·chis

noun, plural ra·chis·es, rach·i·des [rak-i-deez, rey-ki-]. /ˈræk ɪˌdiz, ˈreɪ kɪ-/.

Origin of rachis

OTHER WORDS FROM rachis

Words nearby rachis

Example sentences from the Web for rachis

British Dictionary definitions for rachis

rhachis

noun plural rachises, rhachises, rachides or rhachides (ˈrækɪˌdiːz, ˈreɪ-)

Derived forms of rachis

Word Origin for rachis

Words related to rachis

Medical definitions for rachis

n. pl. ra•chis•es

Scientific definitions for rachis

Plural rachises rachides (răk′ĭ-dēz′, rā′kĭ-)