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he·li·ot·ro·pism (he″le-otґro-piz-əm) [helio- + tropism] the turning of an organism, especially a plant, toward (positive h.) or away from (negative h.) the sun. Cf. heliotaxis.Medical dictionary. 2011.
Heliotropism — is the diurnal motion of plant parts (flowers or leaves) in response to the direction of the sun. Heliotropic flowers track the sun s motion across the sky from East to West. During the night, the flowers may assume a random orientation, while at … Wikipedia
heliotropism — HELIOTROPÍSM s.n. Proprietate pe care o au unele plante de a se îndrepta spre soare sau spre altă sursă de lumină; fototropism. [pr.: li o ] – Din fr. héliotropisme. Trimis de gall, 13.09.2007. Sursa: DEX 98 HELIOTROPÍSM s. v. fototropism.… … Dicționar Român
Heliotropism — He li*ot ro*pism, n. [Helio + Gr. ? to turn.] (Bot.) The phenomenon of turning toward the light, seen in many leaves and flowers. [1913 Webster] … The Collaborative International Dictionary of English
heliotropism — 1854, from HELIOTROPE (Cf. heliotrope) + ISM (Cf. ism) … Etymology dictionary
heliotropism — [hē΄lē ä′trə piz΄əm] n. [ HELIO + TROPISM] any positive, or negative, turning or bending of a plant or sessile animal toward, or away from, light, esp. sunlight heliotropic [hē΄lēō träp′ik] adj. heliotropically adv … English World dictionary
heliotropism — noun Date: circa 1854 phototropism in which sunlight is the orienting stimulus • heliotropic adjective … New Collegiate Dictionary
heliotropism — n. [Gr. helios, sun; trope, a turning] Tropism with sunlight as the stimulus … Dictionary of invertebrate zoology
heliotropism — /hee lee o treuh piz euhm, hee lee euh troh piz euhm/, n. heliotropic tendency or growth. [1850 55; HELIO + TROPISM] * * * … Universalium
heliotropism — noun The property of some plants of turning under the influence of light; either positively (towards the light) or negatively (away from the light) See Also: heliotrope … Wiktionary
heliotropísm — s. n. (sil. li o tro ) … Romanian orthography
