Words in english starting with R

• rectifying valve — Noun – English ～ a thermionic tube having two electrodes; used as a rectifier
• right atrioventricular valve — Noun – English ～ 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
• Rembrandt van Ryn — Noun – English ～ influential Dutch artist (1606-1669)
• Rembrandt van Rijn — Noun – English ～ influential Dutch artist (1606-1669)
• Rembrandt Harmensz van Rijn — Noun – English ～ influential Dutch artist (1606-1669)
• Robert Jemison Van de Graaff — Noun – English ～ United States physicist (1901-1967)
• Robert Van de Graaff — Noun – English ～ United States physicist (1901-1967)
• Republic of Vanuatu — Noun – English ～ a volcanic island republic in Melanesia; independent since 1980
• random variable — Noun – English ～ a variable quantity that is random
• ribbed vault — Noun – English ～ vault that resembles a groined vault but has ribbed arches
• roast veal — Noun – English ～ cut of veal suitable for roasting
• radius vector — Noun – English ～ a line connecting a point in space to the origin of a polar coordinate system
• radius vector — Noun – English ～ a line connecting a satellite to the center of the body around which it is rotating
• rig-veda — Noun – English ～ a Veda consisting of a collection of Hindu poems dating from before 2000 BC
• raw vegetable — Noun – English ～ an uncooked vegetable
• root vegetable — Noun – English ～ any of various fleshy edible underground roots or tubers
• recreational vehicle — Noun – English ～ a motorized wheeled vehicle used for camping or other recreational activities
• reconnaissance vehicle — Noun – English ～ fast armored military vehicle with four-wheel drive and open top
• renal vein — Noun – English ～ veins that accompany renal arteries; open into the vena cava at the level of the 2nd lumbar vertebra
• rectal vein — Noun – English ～ any of several veins draining the walls of the anal canal and rectum

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