rachilla

[ruh-kil-uh]
noun, plural ra·chil·lae [ruh-kil-ee] /rəˈkɪl i/. Botany.
  1. a small or secondary rachis, as the axis of a spikelet in a grass inflorescence.

Origin of rachilla

1835–45; < New Latin, diminutive of rachis rachis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for rachilla

Historical Examples of rachilla

  • It is attached to the axis of the flower and its back is towards the rachilla.

    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

  • Rachilla short, flattened and angular, tapering below (see Festuca elatior).

    Grasses

    H. Marshall Ward

  • Palea very similar to A. fatua, apex 2-4-toothed or bifid, rachilla with stiffer hairs.

    Grasses

    H. Marshall Ward

  • A conspicuous tuft of fine silky hairs, longer than the palea at the base and on the rachilla.

    Grasses

    H. Marshall Ward


British Dictionary definitions for rachilla

rachilla

rhachilla

noun
  1. (in grasses) the short stem of a spikelet that bears the florets

Word Origin for rachilla

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

rachilla in Science

rachilla

[rə-kĭlə]
Plural rachillae (rə-kĭlē)
  1. 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.