define tropisms
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- Home » Morphogenesis » Cellular differentiation » Physiological » Pigmentation » Tropism. Definition. noun, plural: tropisms. A movement or growth response of a cell or an organism to a stimulus, which may either be positive or negative depending on the source and kind of stimulation. Supplement. A tropism is generally an involuntary orienting response of an organism to a stimulus.
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racialism (plural racialisms) 1  The belief in the existence and significance of racial categories. 2  The belief in racial separatist ideologies, the emphasis on perceived social and cultural differences among races. ( 3 UK) Variant term for racism.
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Definitions &Translations Wiktionary (0.00 / 0 votes) Rate this definition: troposphere (Noun). The lower levels of the atmosphere extending from the earth's surface up to the tropopause. It is characterized by convective air movements and a large vertical temperature change.he average depth of the troposphere is approximately 17 km in the middle latitudes. It is deeper in the tropics, up to 20 km, and shallower near the polar regions, at 7 km in summer, and indistinct in winter.
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Suction Catheters, Endotracheal Tube, Tracheostomy Care, Tracheal Suctioning The Tracheal Suction Catheter Kit is primarily used for suctioning secretions and other matter out of the airway to keep it clear. One end of the catheter is connected to a suction canister to collect the debris, while the other end is advanced through the airway (either down the throat or through a tracheostomy tube).
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Brownian motion Brown·i·an motion. n. The random movement of microscopic particles suspended in a liquid or gas, caused by collisions with molecules of the surrounding medium. Also called Brownian movement. [After Robert Brown .].rownian motion-the random motion of small particles suspended in a gas or liquid. Brownian movement, pedesis. motion, movement-a natural event that involves a change in the position or location of something. 1  Facebook.
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- tro·pism. n. The turning or bending movement of an organism or a part of an organism in a particular direction in response to an external stimulus such as light or gravity.[From-tropism .]. tro′pic, tro·pis′tic adj.tro·pis′ti·cal·ly adv.he turning or bending movement of an organism or a part of an organism in a particular direction in response to an external stimulus such as light or gravity. [From-tropism .]. tro′pic, tro·pis′tic adj. tro·pis′ti·cal·ly adv.
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- uk ​ /ˈtruː.ɪ.zəm/ us ​ /ˈtruː.ɪ.zəm/. › a statement that is so obviously true that it is almost not worth saying: As far as health is concerned, it's a truism that prevention is better than cure. Thesaurus: synonyms and related words. Reality and truth. a slice of life idiom. actuality. authenticity. fact.
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- Definition of TROPISM. 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 to a source of stimulation b: a reflex reaction involving a tropism.2.: 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 to a source of stimulation b: a reflex reaction involving a tropism.
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truism truism - an obvious truth. 1  true statement, truth - a true statement; he told the truth; he thought of answering with the truth but he knew they wouldn't believe it. 2  banality, cliche, commonplace, platitude, bromide - a trite or obvious remark.
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flying flying. adj. 1. (prenominal) hurried; fleeting: a flying visit. 2. (prenominal) designed for fast action. 3. (prenominal) moving or passing quickly on or as if on wings: a flying leap; the flying hours.lying. adj. 1. (prenominal) hurried; fleeting: a flying visit. 2. (prenominal) designed for fast action. 3. (prenominal) moving or passing quickly on or as if on wings: a flying leap; the flying hours.
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tropism Driesch has found that a tropism underlies the arrangement of the skeleton in the pluteus larvae of the sea-urchin. Darwin and Modern Science A.C. Seward and Others. As a type of human behavior it may be explained, like the attraction of the flame for the moth, as a sort of tropism.
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- Driesch has found that a tropism underlies the arrangement of the skeleton in the pluteus larvae of the sea-urchin. As a type of human behavior it may be explained, like the attraction of the flame for the moth, as a sort of tropism. Introduction to the Science of Sociology Robert E. Park. This may be a tropism (stereotropism) or it may be a mere surface tension phenomenon.
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What is phototropism? Tropisms are growthg responses in plants in which the direction of growth depends on the direction of the stimulus. Phototropism is the response to light.The shoots of plants … are positively phototropic (grow towards the light) while the roots are negatively phototropic (grow away from light).hototropism refers to the growth of certain living organisms  (mainly plants and bacteria) which occurs towards  a light source.    Positive phototropism will be exp … ressed by growing towards light,  negative phototrophism will be expressed by growing away from  light.
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Definitions &Translations Viruses and other pathogens also affect what is called host tropism, tissue tropism, or cell tropism, or in which case tropism refers to the way in which different viruses/pathogens have evolved to preferentially target specific host species, specific tissue, or specific cell types within those species.
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orthoptics orthoptics (ɔːˈθɒptɪks) n (Medicine) (functioning as singular) the science or practice of correcting defective vision, as by exercises to strengthen weak eye muscles. orthoptics the art of treating visual defects by exercise and retraining in Visual habits. — orthoptist, n. — orthoptic, adj.
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- ‘the term is an Americanism dating back to the late nineteenth century’ 1.1 A custom, quality, or institution characteristic of the United States. ‘Americanisms such as the barbecue and the swimming pool’
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Tropism Phycomyces, a fungus, exhibiting phototropism. A tropism (from Greek τρόπος, tropos, 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 movements which are non-directional responses).
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RESPONSE tropism - an involuntary orienting response; positive or negative reaction to a stimulus source. 1  response, reaction - a bodily process occurring due to the effect of some antecedent stimulus or agent; a bad reaction to the medicine; his responses have slowed with age. 2  ergotropism - an affinity for work.
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tropism Driesch has found that a tropism underlies the arrangement of the skeleton in the pluteus larvae of the sea-urchin. As a type of human behavior it may be explained, like the attraction of the flame for the moth, as a sort of tropism. This may be a tropism (stereotropism) or it may be a mere surface tension phenomenon.
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trope trope. n. 1. A figure of speech using words in nonliteral ways, such as a metaphor. 2. A word or phrase interpolated as an embellishment in the sung parts of certain medieval liturgies.
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- Definition of ANABOLISM. : the constructive part of metabolism concerned especially with macromolecular synthesis — compare catabolism.— an·a·bol·ic \ˌa-nə-ˈbae-ˈbä\ lik. Adjective see anabolism defined for. KIDS. advertisement the constructive part of metabolism concerned especially with macromolecular synthesis — compare catabolism. — an·a·bol·ic \ˌa-nə-ˈbae-ˈbä\ lik. Adjective see anabolism defined for. kids
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tropical tropical - relating to or situated in or characteristic of the tropics (the region on either side of the equator); tropical islands; tropical fruit. tropic. equatorial - of or existing at or near the geographic equator; equatorial Africa.
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embolism embolism. n. 1. (Pathology) the occlusion of a blood vessel by an embolus. 2. (Botany) botany the blocking of a xylem vessel by an air bubble. 3. (Horology) the insertion of one or more days into a calendar, esp the Jewish calendar; intercalation.
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- (countable and uncountable, plural regionalisms). 1  Affection, often excessive, to one's own region and to everything related to it. 2  Political tendency to concede forms of politico-administrative autonomy to regions. ( 3 countable, linguistics) A word or phrase originating in, characteristic of, or limited to a region.
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Medical Dictionary Medical Definition of orthoptics. : the treatment or the art of treating defective visual habits, defects of binocular vision, and muscle imbalance (as strabismus) by reeducation of visual habits, exercise, and visual training.
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Brownian motion Medical Definition of Brownian motion. : a random movement of microscopic particles suspended in liquids or gases resulting from the impact of molecules of the fluid surrounding the particles—called also Brownian movement.