Definitions from Wiktionary (RH)

▸ noun:  (medicine) Abbreviation of Rhesus factor. [An antigen of the Rhesus system; understood unless otherwise specified to refer to Rhesus factor D (RhD), which appears on the surface of the red blood cells of most (85%) humans. An incompatibility between the Rh-blood types of a mother and her baby may cause serious disease for the baby.]
▸ noun:  (medicine) Abbreviation of Rhesus. [(medicine, attributive, also without cap.) Denotes a system for categorising human blood types based on the presence or absence of various antigens, especially Rhesus factor D.]
▸ noun:  Initialism of relative humidity. [(meteorology) The ratio of the actual amount of water vapor (absolute humidity) present in the air to the saturation point at the same temperature, usually expressed as a percentage.]
▸ noun:  (music, knitting) Initialism of right hand. [A trusted assistant.]
▸ noun:  Initialism of review hearing.
▸ noun:  (US, army, aviation) Initialism of reconnaissance helicopter.
▸ noun:  (pornography, literature) Initialism of reverse harem (a genre of fiction in which a woman has multiple male sexual partners or love interests). [A group of someone's boyfriends and/or husbands in a polygamous household.]




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