1. (noun) rhesus factor, Rh factor, Rh
a blood group antigen possessed by Rh-positive people; if an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia
Synonyms: rhodium, hypothalamic releasing factor, hypothalamic releasing hormone, rhesus factor, releasing factor, releasing hormone, atomic number 45
2. (noun) rhodium, Rh, atomic number 45
a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
Synonyms: rhesus factor, rhodium, hypothalamic releasing factor, hypothalamic releasing hormone, atomic number 45, releasing factor, releasing hormone
3. (noun) releasing hormone, RH, releasing factor, hypothalamic releasing hormone, hypothalamic releasing factor
any of several hormones produced in the hypothalamus and carried by a vein to the anterior pituitary gland where they stimulate the release of anterior pituitary hormones; each of these hormones causes the anterior pituitary to secrete a specific hormone
Synonyms: rhodium, hypothalamic releasing factor, hypothalamic releasing hormone, rhesus factor, releasing factor, releasing hormone, atomic number 45
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Synonyms and Antonyms of RH 
