Noun rh has 3 senses
- 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
--1 is a kind of antigen
- 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
--2 is a kind of metallic element, metal
- 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 releasing hormone causes the anterior pituitary to secrete a specific hormone
--3 is a kind of hormone, endocrine, internal secretion
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