orthotropous

[awr-tho-truh-puhs]

or·thot·ro·pous

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

Origin:
1820–30; < Neo-Latin orthotropus. See ortho-, -tropous
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Orthotropous is always a great word to know.
So is alternation of generations. Does it mean:
composed of several cells
variation in an organism's life cycle of dissimilar reproductive forms
Collins
World English Dictionary
orthotropous (ɔːˈθɒtrəpəs)
 
adj
Compare anatropous (of a plant ovule) growing straight during development so that the micropyle is at the apex

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