orthotropism

or·thot·ro·pism

[awr-tho-truh-piz-uhm]
noun
Botany. orthotropic tendency or growth.

Origin:
1880–85; ortho- + -tropism

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
orthotropic (ˌɔːθəʊˈtrɒpɪk) [Click for IPA pronunciation guide]
 
adj
1.  botany relating to or showing growth that is in direct line with the stimulus
2.  (of a material) having different elastic properties in different planes
 
orthotropism
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Orthotropism is always a great word to know.
So is naked seed. Does it mean:
phase in plant life which starts with a zygote produced by sexual reproduction
ovules which are unenclosed, forming on cones or stalks
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