Definition of organ

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Organ (n.) A natural part or structure in an animal or a plant, capable of performing some special action (termed its function), which is essential to the life or well-being of the whole; as, the heart, lungs, etc., are organs of animals; the root, stem, foliage, etc., are organs of plants..

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Intussusception :: Intussusception (n.) The act of taking foreign matter, as food, into a living body; the process of nutrition, by which dead matter is absorbed by the living organism, and ultimately converted into the organized substance of its various tissues and organs..
Stoma :: Stoma (n.) The minute breathing pores of leaves or other organs opening into the intercellular spaces, and usually bordered by two contractile cells..
Cortex :: Cortex (n.) The outer or superficial part of an organ; as, the cortex or gray exterior substance of the brain..
Apoda :: Apoda (n.) A group of cirripeds, destitute of footlike organs..
Lithophyte :: Lithophyte (n.) A hard, or stony, plantlike organism, as the gorgonians, corals, and corallines, esp. those gorgonians having a calcareous axis. All the lithophytes except the corallines are animals..
Sound :: Sound (v. i.) To make a noise; to utter a voice; to make an impulse of the air that shall strike the organs of hearing with a perceptible effect.
Phyllome :: Phyllome (n.) A foliar part of a plant; any organ homologous with a leaf, or produced by metamorphosis of a leaf..
Fricative :: Fricative (a.) Produced by the friction or rustling of the breath, intonated or unintonated, through a narrow opening between two of the mouth organs; uttered through a close approach, but not with a complete closure, of the organs of articulation, and hence capable of being continued or prolonged; -- said of certain consonantal sounds, as f, v, s, z, etc..
Geomalism :: Geomalism (n.) The tendency of an organism to respond, during its growth, to the force of gravitation..
Tremolo :: Tremolo (n.) A certain contrivance in an organ, which causes the notes to sound with rapid pulses or beats, producing a tremulous effect; -- called also tremolant, and tremulant..
Myriapoda :: Myriapoda (n. pl.) A class, or subclass, of arthropods, related to the hexapod insects, from which they differ in having the body made up of numerous similar segments, nearly all of which bear true jointed legs. They have one pair of antennae, three pairs of mouth organs, and numerous trachaae, similar to those of true insects. The larvae, when first hatched, often have but three pairs of legs. See Centiped, Galleyworm, Milliped..
System :: System (n.) An assemblage of parts or organs, either in animal or plant, essential to the performance of some particular function or functions which as a rule are of greater complexity than those manifested by a single organ; as, the capillary system, the muscular system, the digestive system, etc.; hence, the whole body as a functional unity..
Ovipositor :: Ovipositor (n.) The organ with which many insects and some other animals deposit their eggs. Some ichneumon files have a long ovipositor fitted to pierce the eggs or larvae of other insects, in order to lay their own eggs within the same..
Cul-de-sac :: Cul-de-sac (n.) Any bag-shaped or tubular cavity, vessel, or organ, open only at one end..
Propiolic :: Propiolic (a.) Pertaining to, or designating, an organic acid (called also propargylic acid) of the acetylene or tetrolic series, analogous to propionic acid, and obtained as a white crystalline substance..
Protocatechuic :: Protocatechuic (a.) Pertaining to, derived from, or designating, an organic acid which is obtained as a white crystalline substance from catechin, asafetida, oil of cloves, etc., and by distillation itself yields pyrocatechin..
Morphosis :: Morphosis (n.) The order or mode of development of an organ or part.
Sting :: Stimulus (v. t.) That which excites or produces a temporary increase of vital action, either in the whole organism or in any of its parts; especially (Physiol.), any substance or agent capable of evoking the activity of a nerve or irritable muscle, or capable of producing an impression upon a sensory organ or more particularly upon its specific end organ..
Para- :: Para- () A prefix denoting: (a) Likeness, similarity, or connection, or that the substance resembles, but is distinct from, that to the name of which it is prefixed; as paraldehyde, paraconine, etc.; also, an isomeric modification. (b) Specifically: (Organ. Chem.) That two groups or radicals substituted in the benzene nucleus are opposite, or in the respective positions 1 and 4; 2 and 5; or 3 and 6, as paraxylene; paroxybenzoic acid. Cf. Ortho-, and Meta-. Also used adjectively..
Organical :: Organical (a.) Organic.
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