orthotropism

orthotropism

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

Origin:
1880–85; ortho- + -tropism

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World English Dictionary
orthotropic (ˌɔːθəʊˈtrɒpɪk)
 
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

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