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ritual
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any customary observance or practice of or relating to or characteristic of religious rituals; "ritual killing" the prescribed procedure for conducting religious ceremonies stereotyped behavior of or relating to or employed in social rites or rituals; "a ritual dance of Haiti"; "sedate little colonial tribe with its ritual tea parties"- Nadine Gordimer
출처: wordnet.princeton.edu/perl/webwn
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rib
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support resembling the rib of an animal any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates) cut of meat including one or more ribs a teasing remark a riblike supporting or strengthening part of an animal or plant form vertical ribs by knitting; "A ribbed sweater" ridicule: subject to laughter or ridicule; "The satirists ridiculed the plans for a new opera house"; "The students poked fun at the inexperienced teacher"; "His former students roasted the professor at his 60th birthday" a projecting molding on the underside of a vault or ceiling; may be ornamental or structural
출처: wordnet.princeton.edu/perl/webwn
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right angle
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the 90 degree angle between two perpendicular lines quadrant: a quarter of the circumference of a circle
출처: wordnet.princeton.edu/perl/webwn
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right atrioventricular valve
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tricuspid valve: valve with three cusps; situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts
출처: wordnet.princeton.edu/perl/webwn
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right ventricle
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the chamber on the right side of the heart that receives venous blood from the right atrium and pumps it into the pulmonary trunk
출처: wordnet.princeton.edu/perl/webwn
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