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tropism

(trō′piz′əm)

noun

the positive, or negative, attraction of a plant or sessile animal toward, or away from, a stimulus, as in the turning of a sunflower toward the light

Origin: < -tropism

Related Forms:

tropistic adjective

tropism: heliotropism

Origin: < -trop(e) + -ism

See tropism in American Heritage Dictionary 4

noun

The turning or bending movement of an organism or a part toward or away from an external stimulus, such as light, heat, or gravity.

Origin:

Origin: From -tropism

Related Forms:

troˈpic, tro·pisˈtic adjective

tro·pisˈti·cal·ly adverb

suffix

Tropism: phototropism.

Origin:

Origin: From Greek tropē, a turning; see -tropic

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