diageotropism

di·a·ge·ot·ro·pism

[dahy-uh-jee-o-truh-piz-uhm]
noun Botany.
diageotropic tendency or growth.

Origin:
1875–80; dia- + geotropism

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World English Dictionary
diageotropism (ˌdaɪədʒɪˈɒtrəˌpɪzəm) [Click for IPA pronunciation guide]
 
n
a diatropic response of plant parts, such as rhizomes, to the stimulus of gravity
 
diageotropic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Diageotropism has a plethora of syllables.
So is pneumonoultramicroscopicsilicovolcanoconiosis. Does it mean:
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S.
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