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

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 of orthotropous

British Dictionary definitions for orthotropous


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