negative tropism

См. также в других словарях:

• negative tropism — The tendency to retreat from stimuli …   Dictionary of invertebrate zoology

• negative — [neg′ə tiv] adj. [ME negatife < OFr or L: OFr négatif < L negativus < negatus: see NEGATION] 1. containing, expressing, or implying a denial or refusal; that says “no” [a negative reply] 2. opposite to something regarded as positive;… …   English World dictionary

• negative — I. adjective Date: 15th century 1. a. marked by denial, prohibition, or refusal < received a negative answer >; also marked by absence, withholding, or removal of something positive < the negative motivation of shame Garrett Hardin > b. (1)… …   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

• negative — 1. Not affirmative; refutative; not positive; not abnormal. 2. Denoting failure of response, absence of a reaction, or absence of an entity or condition in question. [L. negativus, fr. nego, to deny] * * * neg·a·tive neg ət iv …   Medical 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 — 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 — The phenomenon, observed in living organisms, of moving toward (positive t.) or away from (negative t.) a focus of light, heat, or other stimulus; usually applied to the movement of a portion of the organism as opposed to taxis, the …   Medical dictionary

• tropism — n. orientation of an organism usually involving growing in positive or negative response to stimuli (Biology) …   English contemporary dictionary

• photophobotaxis — n. [Gr. phos, light; phobos, fear; taxis, arrangement] Movement involved in the avoidance of light; negative tropism …   Dictionary of invertebrate zoology