either of two valves, one in the aorta and one in the pulmonary artery, consisting of a set of three crescent-shaped flaps of tissue and serving to prevent blood from flowing back into the heart after contraction.
(anatomy) either of two crescent-shaped valves, one in the aorta and one in the pulmonary artery, that prevent regurgitation of blood into the heart
semilunar valve n.
One of three semilunar segments serving as the cusps of a valve preventing regurgitation, as in the aortic valve and the pulmonary valve.
noun, plural luxuries. 1. a material object, service, etc., conducive to sumptuous living, usually a delicacy, elegance, or refinement of living rather than a necessity: Gold cufflinks were a luxury not allowed for in his budget. 2. free or habitual indulgence in or enjoyment of comforts and pleasures in addition to those necessary for a […]
[sem-ee-mey-jer, sem-ahy-, sem-ee-, sem-ahy-] /ˈsɛm iˈmeɪ dʒər, ˈsɛm aɪ-, ˌsɛm i-, ˌsɛm aɪ-/ noun 1. Geometry. one half the major axis of an ellipse. 2. Astronomy. one half the major axis of the ellipse that one celestial body describes around another, as a planet around the sun or a satellite around a planet, equivalent to […]
adjective 1. disposed to cause harm, suffering, or distress deliberately; feeling or showing ill will or hatred. 2. very dangerous or harmful in influence or effect. 3. Pathology. tending to produce death, as bubonic plague. (of a tumor) characterized by uncontrolled growth; cancerous, invasive, or metastatic. adjective 1. having or showing desire to harm others […]
noun 1. the making of goods or wares by manual labor or by machinery, especially on a large scale: the manufacture of television sets. 2. the making or producing of anything; generation: the manufacture of body cells. 3. the thing or material manufactured; product: Plastic is an important manufacture. verb (used with object), manufactured, manufacturing. […]