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Growing straight, so that the micropyle is at the end opposite the stalk. Used of an ovule.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Botany) (of a plant ovule) growing straight during development so that the micropyle is at the apex. Compare anatropous
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
or•thot•ro•pous(ɔrˈθɒ trə pəs)
(of an ovule) straight and symmetrical, with the chalaza at the evident base and the micropyle at the opposite extremity.
[1820–30; < New Latin orthotropus]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Adj.||1.||orthotropous - (of a plant ovule) completely straight with the micropyle at the apex|
campylotropous - (of a plant ovule) curved with the micropyle near the base almost touching its stalk
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