| PHOTOTAXIS | • phototaxis n. (Biology) The movement of an organism either towards or away from a source of light. • PHOTOTAXIS n. growth or movement determined by light.
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| ANTHOTAXIES | • anthotaxies n. Plural of anthotaxy. • ANTHOTAXY n. the arrangement of flowers on a stem or parts on a flower.
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| HETEROTAXIS | • heterotaxis n. An abnormal structural arrangement. • HETEROTAXIS n. the anomalous arrangement of body parts.
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| PHOTOTAXIES | • PHOTOTAXY n. the movement of an entire organism in response to light. | 
| THERMOTAXIS | • thermotaxis n. (Biology) Movement in response to temperature. • THERMOTAXIS n. movement influenced or controlled by heat.
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| THIGMOTAXES | • thigmotaxes n. Plural of thigmotaxis. • THIGMOTAXIS n. the movement of a plant towards or away from an object.
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| THIGMOTAXIS | • thigmotaxis n. (Biology) The movement of an organism either towards or away from the stimulus of physical contact. • THIGMOTAXIS n. the movement of a plant towards or away from an object.
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| TROPHOTAXIS | • TROPHOTAXIS n. chemotaxis and chemotropism where the stimulating substance is food. | 
| XANTHATIONS | • xanthations n. Plural of xanthation. • XANTHATION n. the formation of a xanthate, a salt of xanthic acid.
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| EXHORTATIONS | • exhortations n. Plural of exhortation. • EXHORTATION n. an act or instance of exhorting.
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| HETEROTAXIAS | • HETEROTAXIA n. the abnormal disposition of organs or parts, also HETEROTAXY. | 
| HETEROTAXIES | • HETEROTAXY n. the abnormal disposition of organs or parts, also HETEROTAXIA. | 
| ANTHOXANTHINS | • anthoxanthins n. Plural of anthoxanthin. • ANTHOXANTHIN n. a yellow pigment in plants.
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| XANTHOPTERINS | • xanthopterins n. Plural of xanthopterin. • XANTHOPTERIN n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERINE.
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| XANTHOPTERINES | • XANTHOPTERINE n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERIN. | 
| CHEMOTAXONOMIST | • chemotaxonomist n. One who studies chemotaxonomy. • CHEMOTAXONOMIST n. one who practises chemotaxonomy.
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| HETEROSEXUALITY | • heterosexuality n. The state of being sexually and romantically attracted primarily or exclusively to persons of the opposite sex. • heterosexuality n. Sexual activity with a person of the opposite sex.
 • HETEROSEXUALITY n. the state of being heterosexual.
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| HYDROXYAPATITES | • hydroxyapatites n. Plural of hydroxyapatite. • HYDROXYAPATITE n. a complex phosphate of calcium that occurs as a mineral and is the chief structural element of vertebrate bone.
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| PHOTOOXIDATIONS | • photooxidations n. Plural of photooxidation. • PHOTOOXIDATION n. oxidation under the influence of radiant energy, as light.
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