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rachilla

[ruh-kil-uh] /rəˈkɪl ə/
noun, plural rachillae
[ruh-kil-ee] /rəˈkɪl i/ (Show IPA).
Botany
1.
a small or secondary rachis, as the axis of a spikelet in a grass inflorescence.
Origin of rachilla
1835-1845
1835-45; < New Latin, diminutive of rachis rachis
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for rachilla
Historical Examples
  • The fourth glume is very minute, awned and is borne by a rachilla produced to half the length of the third glume.

    A Handbook of Some South Indian Grasses Rai Bahadur K. Ranga Achariyar
  • The caryopsis is very narrow, and the rachilla long and feathered with hairs.

    Grasses H. Marshall Ward
  • Spikelets are contracted spiciform panicles, 1- to 3-flowered, rachilla is jointed at the base.

    A Handbook of Some South Indian Grasses Rai Bahadur K. Ranga Achariyar
  • rachilla short, flattened and angular, tapering below (see Festuca elatior).

    Grasses H. Marshall Ward
  • The rachilla is produced beyond the flowering glumes and articulate at the base just above the empty glumes.

    A Handbook of Some South Indian Grasses Rai Bahadur K. Ranga Achariyar
  • Palea very similar to A. fatua, apex 2-4-toothed or bifid, rachilla with stiffer hairs.

    Grasses H. Marshall Ward
  • In the variety of Chevallier known as Archer, however, the rachilla has somewhat long hairs.

  • rachilla distinct, smooth, much wrapped in, widens upwards and is somewhat flattened.

    Grasses H. Marshall Ward
  • In Eriochloa it is reduced to a minute ridge lying just close to the swollen ring-like joint of the rachilla.

    A Handbook of Some South Indian Grasses Rai Bahadur K. Ranga Achariyar
  • The absence of awn, rachilla, and basal hairs distinguishes Agrostis from Aira.

    Grasses H. Marshall Ward
British Dictionary definitions for rachilla

rachilla

/rəˈkɪlə/
noun
1.
(in grasses) the short stem of a spikelet that bears the florets
Word Origin
C19: from New Latin, diminutive of rachis
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
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rachilla in Science
rachilla
  (rə-kĭl'ə)   
Plural rachillae (rə-kĭl'ē)
The stalk that bears the florets in the spikelets of grasses and similar plants, such as rushes and sedges. The rachilla often has a zigzag shape, with florets at each point at which the orientation of the rachilla turns.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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