MeSH definition : The directional growth of an organism in response to an external stimulus such as
light, touch, or gravity. Growth towards the stimulus is a positive tropism; growth
away from the stimulus is a negative tropism. (From Concise Dictionary of Biology,
1990);
MeSH synonym : tropisms;
MeSH annotation : distinguish -tropic from -trophic (nutritional);
Wikipedia link : https://en.wikipedia.org/wiki/Tropism;
The directional growth of an organism in response to an external stimulus such as
light, touch, or gravity. Growth towards the stimulus is a positive tropism; growth
away from the stimulus is a negative tropism. (From Concise Dictionary of Biology,
1990)
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