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rachis
‖ rachis (ˈreɪkɪs) Also rha-. Pl. rachides (ˈreɪkɪdiːz). [mod.L., a. Gr. ῥάχις spine, ridge, rib (of a leaf), etc. The more precise spelling rhachis is chiefly confined to sense 2. The pl. rachides is erroneous, as the stem of ῥάχις is not ῥαχιδ- but ῥαχι-.] 1. Bot. a. The axis of an inflorescence i...
Oxford English Dictionary
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Rachis
The rachis is filled with cytoplasm.
In botany
In plants, a rachis is the main axis of a compound structure. a short segment of the rachis.
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Rachis (gastropod)
Species
Rachis ambongoensis Fischer-Piette, 1964
Rachis aurea (Heude, 1890)
Rachis badiola (Morelet, 1881)
Rachis bewsheri (Morelet, 1877)
Rachis )
Rachis nigrilineata (Reeve, 1849)
Rachis obeliscus C.
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Rachis (disambiguation)
In biology, a rachis is a main axis or "shaft". Rachis may also refer to:
Rachiș, a left tributary of the river Aiud in Romania
Rachis (gastropod), a genus of land snails
See also
Rachi (disambiguation
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rachilla
‖ rachilla Bot. (rəˈkɪlə) [mod.L. dim. of rachis.] (See quot. 1842.)1842 Brande Dict., Rachilla, a branch of inflorescence; the zigzag centre upon which the florets are arranged in the spikelets of grasses. 1881 Bentham in Jrnl. Linn. Soc. XVIII. 367 The rhachilla present, but not exceeding the glum...
Oxford English Dictionary
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Rachis comorensis
Rachis comorensis is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the superfamily Enoidea.
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rachidian
rachidian, a. (rəˈkɪdɪən) Also rha-. [f. r(h)achid-, assumed stem of Gr. ῥάχις rachis + -ian. Cf. F. rachidien.] Of or pertaining to a rachis, chiefly in sense 2 b. So also raˈchidial a.1848 [see rachial]. 1851 Woodward Mollusca iv. 27 The rachidian teeth sometimes form a single series. 1866 R. Tate...
Oxford English Dictionary
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Rachis tulearensis
Rachis tulearensis is a species of conical air-breathing land snail, a gastropod mollusk in the family Cerastidae.
Distribution
Madagascar.
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rachisagra
rachiˈsagra Path. [Irreg. f. Gr. ῥάχις rachis, after χειράγρα, ποδάγρα podagra. Some recent medical dicts. also give rachidagra and (correctly) rachiagra.] Pain in the spine; spinal gout.1753 in Chambers Cycl. Supp.
Oxford English Dictionary
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Rachis sanguineus
Rachis sanguineus is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the superfamily Enoidea.
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scobina
‖ scobina Bot. (skəʊˈbaɪnə) [mod.L., use of L. scobīna rasp.] ‘The zigzag rachis of the spikelets of grasses’ (Treas. Bot. 1866).1839 Lindley Introd. Bot. i. ii. (ed. 3) 153 In the spikelets of Grasses the rachis has an unusual, toothed, flexuose appearance, and has received the name of scobina from...
Oxford English Dictionary
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Peduncle (botany)
The main axis of an inflorescence above the peduncle is the rachis. There are no flowers on the peduncle but there are flowers on the rachis. level, either from a compressed aerial stem or from a subterranean stem (rhizome, tuber, bulb, corm), with few or no bracts except the part near the rachis
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Rachilla
may refer to the following topics in botany:
Rachilla (floral axis), the part of the spikelet that bears the florets in grasses and sedges
Rachilla (rachis ), a secondary rachis in leaves that are compound more than once
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Pinanga cattienensis
and 9–13 (vs. 5–7) pinnae per side of the rachis. Petioles are 0.87-1.16 m long and green; the rachis is 900–950 mm long, with 9-13 pinnae each side of rachis, which are linear and contracted at the bases
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