Tropism Tro"pism (tr[=o]"p[i^]z'm), n. [Gr. troph` a turning, tre`pein to turn + -ism.] (Physiol.) Modification of the direction of growth, caused by some external influence, such as light; -- sometimes used for motion of an organism toward or away from an external stimulus, more properly called {taxis}. [Webster 1913 Suppl. +PJC]

The Collaborative International Dictionary of English. 2000.

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  • tropism — TROPÍSM, tropisme, s.n. Tendinţă de acomodare şi de orientare a unui organism vegetal fixat de pământ, într o anumită direcţie, sub influenţa unei excitaţii exterioare ca lumina, căldura, gravitaţia, umiditatea etc. – Din fr. tropisme. Trimis de… …   Dicționar Român

  • -tropism — [trə piz΄əm] [< TROP(E) + ISM] combining form forming nouns tropism [heliotropism] …   English World dictionary

  • tropism — [trō′piz΄əm] n. [< TROPISM] 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 tropistic adj …   English World dictionary

  • tropism — 1899, tendency of an animal or plant to turn or move in response to a stimulus, abstracted from geotropism, ult. from Gk. tropos (see TROPE (Cf. trope)) …   Etymology dictionary

  • tropism — ► NOUN Biology ▪ the turning of all or part of an organism in response to an external stimulus. ORIGIN from Greek tropos turning …   English terms dictionary

  • Tropism — A tropism (from Greek, tropos , to turn) is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. In tropisms, this response is dependent on the… …   Wikipedia

  • tropism — noun Etymology: International Scientific Vocabulary tropism Date: 1899 1. a. involuntary orientation by an organism or one of its parts that involves turning or curving by movement or by differential growth and is a positive or negative response… …   New Collegiate Dictionary

  • tropism — n. [Gr. tropos, turn] A movement, orientation or locomotion of a motile organism in response to a stimulus. a. Positive tropism: toward the stimulus. b. Negative tropism: away from the stimulus; see taxis …   Dictionary of invertebrate zoology

  • tropism — tropismatic /troh piz mat ik/, adj. tropistic /troh pis tik/, adj. /troh piz euhm/, n. Biol. an orientation of an organism to an external stimulus, as light, esp. by growth rather than by movement. [1895 1900; independent use of TROPISM] * * * ▪… …   Universalium

  • -tropism — trəˌpizəm, in some words .ˌtrōˌpizəm noun combining form ( s) Etymology: International Scientific Vocabulary, from trope (I) + ism : tendency to turn toward : affinity for : tropism …   Useful english dictionary

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