| Pronunciation: | | `heelee'âtru`pizum
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 WordNet Dictionary |
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| | Definition: | |
[n] an orienting response to the sun |
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HELIOTROPISM is a 12 letter word that starts with H. |
| | See Also: | | tropism |
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| Webster's 1913 Dictionary |
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| | Definition: | | \He`li*ot"ro*pism\, n. [Helio- + Gr. ? to turn.]
(Bot.)
The phenomenon of turning toward the light, seen in many
leaves and flowers.
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