response or orientation of a plant or certain lower animals to a stimulus that acts with greater intensity from one direction than another. It may be ... [3 related articles]
Found op http://www.britannica.com/eb/a-z/t/84
A tropism (from Greek τροπή, trope, "a turning") 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 direction of the stimulus (as opposed to nastic...
Found op http://en.wikipedia.org/wiki/Tropism
tropism (trōp'izum) , involuntary response of an organism, or part of an organism, involving orientation toward (positive tropism) or away from (negative tropism) one or more external stimuli. The term tropism is usually applied to growth and turgor movements in plants; an involuntary orie...
Found op http://www.infoplease.com/ce6/sci/A0849494.html
Tropism is a biological term for the behaviour of animals and plants with respect to light or other stimuli.
Found op http://www.probertencyclopaedia.com/browse/ET.HTM
Type: Term Pronunciation: trō′pizm Definitions: 1. The phenomenon, observed in living organisms, of moving toward (positive tropism) or away from (negative tropism) a focus of light, heat, or other stimulus; usually applied to the movement of a portion of the organism as opposed to taxis,...
Found op http://www.medilexicon.com/medicaldictionary.php?t=94204
Directional growth of a plant, or part of a plant, in response to an external stimulus such as gravity or light. If the movement is directed towards the stimulus it is described as positive; if away from it, it is negative. Geotropism for example, the response of plants to gravity, causes the root (...
Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0007087.html
the turning of a plant part such as a leaf in response to some external stimuli
Found op http://www.encyclo.co.uk/local/21767
1) Reaction 2) Response 3) Why plants turn to the sun
Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/tropism/1
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