/hee'lee o"treuh piz'euhm, hee'lee euh troh"piz euhm/, n.
heliotropic tendency or growth.
[1850-55; HELIO- + -TROPISM]

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Universalium. 2010.

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  • 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

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  • 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 — 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

  • heliotropism — SYN: heliotaxis. [helio + G. trope, a turning] * * * he·li·ot·ro·pism .hē lē ä trə .piz əm n phototropism in which sunlight is the orienting stimulus he·lio·tro·pic lē ə trōp ik, träp adj * * * he·li·ot·ro·pism (he″le otґro piz əm)… …   Medical dictionary

  • heliotropísm — s. n. (sil. li o tro ) …   Romanian orthography

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