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orthotropous

[awr-tho-truh-puh s]
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adjective
  1. Botany. (of an ovule) straight and symmetrical, with the chalaza at the evident base and the micropyle at the opposite extremity.
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Origin of orthotropous

From the New Latin word orthotropus, dating back to 1820–30. See ortho-, -tropous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for orthotropous

Historical Examples

  • Orthotropous ovule of Buckwheat: c, hilum and chalaza; f, orifice.

    The Elements of Botany

    Asa Gray

  • Fruit a kind of dry drupe, with a crustaceous or bony nut-shell, containing a large 4-lobed orthotropous seed.

  • Orthotropous or Straight, those which develop without curving or turning, as in Fig. 344.


British Dictionary definitions for orthotropous

orthotropous

adjective
  1. (of a plant ovule) growing straight during development so that the micropyle is at the apexCompare anatropous
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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