- positive heliotropism
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English-Arabic Medical Dictionary. 2013.
positive heliotropism
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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
positive phototropism — Phototropism Pho*tot ro*pism, n. [Photo + Gr. ? to turn.] 1. (Plant Physiol.) The tendency of growing plant organs to move or curve under the influence of light. In ordinary use the term is practically synonymous with {heliotropism}. [Webster… … The Collaborative International Dictionary of English
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
heliotropy — heliotropism / otˈrə pizm/ or heliotˈropy noun The tendency of stem and leaves to bend towards (positive heliotropism), and roots from (negative heliotropism), the light • • • Main Entry: ↑helio … Useful english dictionary
heliotaxis — A form of phototaxis, and perhaps of thermotaxis, in which there is a tendency to growth or movement toward (positive h.) or away from (negative h.) the sun or the sunlight. SYN: heliotropism. [helio + G. taxis, orderly arrangement] * * *… … Medical dictionary
Phototropism — is directional growth in which the direction of growth is determined by the direction of the light source. In other words, it is the growth and response to a light stimulus. Phototropism is most often observed in plants, but can also occur in… … Wikipedia
Chemotropism — is growth of organisms (or parts of organism) such as bacteria and plants, navigated by chemical stimulus from outside of the organism. The response by the plant is termed ‘positive’ if the growth is towards the stimulus or ‘negative’ if the… … Wikipedia
negative phototropism — Phototropism Pho*tot ro*pism, n. [Photo + Gr. ? to turn.] 1. (Plant Physiol.) The tendency of growing plant organs to move or curve under the influence of light. In ordinary use the term is practically synonymous with {heliotropism}. [Webster… … The Collaborative International Dictionary of English
Phototropism — Pho*tot ro*pism, n. [Photo + Gr. ? to turn.] 1. (Plant Physiol.) The tendency of growing plant organs to move or curve under the influence of light. In ordinary use the term is practically synonymous with {heliotropism}. [Webster 1913 Suppl.] 2.… … The Collaborative International Dictionary of English
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
phototropism — Movement of a part of an organism toward (positive p.) or away from (negative p.) the stimulus of light. Cf.:phototaxis. [photo + G. trope, a turning] * * * pho·tot·ro·pism fō tä trə .piz əm, .fōt ō trō .piz əm n a tropism in which light is the… … Medical dictionary
