| Pronunciation: | | `fowtow'trowpizum
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 WordNet Dictionary |
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| | Definition: | |
[n] an orienting response to light |
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PHOTOTROPISM is a 12 letter word that starts with P. |
| | See Also: | | tropism |
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| Webster's 1913 Dictionary |
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| | Definition: | | \Pho*tot"ro*pism\, n. [Photo- + Gr. ? to turn.]
(Plant Physiol.)
The tendency of growing plant organs to move or curve under
the influence of light. In ordinary use the term is
practically synonymous with heliotropism.
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