tropism(redirected from positive tropismnegative tropism)
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The turning or bending movement of an organism or a part of an organism in a particular direction in response to an external stimulus such as light or gravity.
tro′pic, tro·pis′tic adj.
(Biology) the response of an organism, esp a plant, to an external stimulus by growth in a direction determined by the stimulus
[from Greek tropos a turn]
tro•pism(ˈtroʊ pɪz əm)
the orientation of an organism toward or away from a stimulus, as light.
[1895–1900; independent use of -tropism]
tro•pis′tic (-ˈpɪs tɪk) adj.
var. of -tropy.
Growth or movement of a plant or animal toward or away from an external stimulus, such as light, heat, or gravity.
the tendency of a plant, animal, or part to move or turn in response to an external stimulus, as sunlight or temperature. — tropistic, adj.See also: Motion
Directional growth movement of a plant in response to a stimulus.
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|Noun||1.||tropism - an involuntary orienting response; positive or negative reaction to a stimulus source|
response, reaction - a bodily process occurring due to the effect of some antecedent stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age"
ergotropism - an affinity for work
geotropism - an orienting response to gravity
heliotropism - an orienting response to the sun
meteortropism - an effect of climate on biological processes (as the effect on joint pains etc.)
neurotropism - an affinity for neural tissues
phototropism - an orienting response to light
trophotropism - an orienting response to food
thermotropism - an orienting response to warmth
n (Biol) → Tropismus m
n. tropismo, tendencia de una célula u organismo a reaccionar de una forma definida (positiva o negativa) en respuesta a estímulos externos.