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rachis

n. 脊椎,脊柱,花轴

脊椎,脊柱,花轴

WordNet (r) 3.0 (2006) (WordNet)

rachis
n 1: axis of a compound leaf or compound inflorescence
2: the series of vertebrae forming the axis of the skeleton and
protecting the spinal cord; "the fall broke his back" [synonym:
{spinal column}, {vertebral column}, {spine}, {backbone},
{back}, {rachis}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Rachis \Ra"chis\ (r[=a]"k[i^]s), n.; pl. E. {Rachises}
(r[=a]"k[i^]s*[e^]z), L. {Rachides} (r[a^]k"[i^]*d[=e]z).
[NL., fr. Gr. "ra`chis, -ios.] [Written also {rhachis}.]
1. (Anat.) The spine; the vertebral column.
[1913 Webster]

2. (Bot. & Zool.) Same as {Rhachis}.
[1913 Webster]

English-French (Internet Dictionary Project)

rachis[Noun]

English-Italian (Internet Dictionary Project)

rachide[Noun]

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英文字典中文字典相关资料:

Rachis - Wikipedia
In plants, a rachis is the main axis of a compound structure It can be the main stem of a compound leaf, such as in Acacia or ferns, or the main, flower-bearing portion of an inflorescence above a supporting peduncle
RACHIS Definition Meaning - Merriam-Webster
The meaning of RACHIS is an axial structure
Colonne vertébrale — Wikipédia
Le rachis est une zone importante d'insertions musculaires En effet, il sert d'ancrage aux muscles de la posture et, au niveau du cou, il reçoit une bonne partie des muscles céphalogyres, qui meuvent la tête
rachis - Wiktionary, the free dictionary
Noun rachis (plural rachises or rachides) (obsolete, zoology, anatomy) The spinal column, or the vertebrae of the spine [17th–19th c ] (zoology) An anatomical shaft or axis in a marine invertebrate [from 18th c ]
RACHIS definition and meaning | Collins English Dictionary
Definition of 'rachis' rachis in British English or rhachis (ˈreɪkɪs ) noun Word forms: plural rachises, rhachises or rachides, rhachides (ˈrækɪˌdiːz , ˈreɪ- )
RACHIS Definition Meaning | Dictionary. com
In all modern feathers, the central shaft or rachis is a hollow tube “The thickness of the rachis in some specimens is 3 microns thick That’s less than the size of the average cell,” O’Connor says Most modern bird feathers have a central shaft called a rachis; think of the ink rod in a quill pen
Rachis - grokipedia. com
The rachis is a biological term referring to the central axis or elongated shaft that supports subordinate structures in various organisms, most prominently serving as the primary stalk bearing leaflets in compound leaves and the main axis of inflorescences in plants, the supportive shaft of feathers in birds, and the vertebral column in
Axis, Rachis, Stem - Master Gardeners of Northern Virginia
If you drew a straight line through the center of an inflorescence, the main axis usually would be the rachis An exception is a capitula, where the main axis is the receptacle The peduncle supports the entire flower cluster and, when a rachis is present, lies below it
RACHIS | English meaning - Cambridge Dictionary
RACHIS definition: 1 the central stem of a leaf or flower spike that has several parts: 2 the spine (= line of… Learn more
Rachis | feather part | Britannica
…a tapered central shaft, the rachis, with paired branches (barbs) on each side An unbranched basal section of the rachis is called the calamus, part of which lies beneath the skin

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