Rh /ˌɑrˈeʧ/
Rh
n 1: 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
[syn: rhesus factor, Rh factor]
2: a white hard metallic element that is one of the platinum
group and is found in platinum ores; used in alloys with
platinum [syn: rhodium, atomic number 45]
3: 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 [syn: releasing hormone, releasing
factor, hypothalamic releasing hormone, hypothalamic
releasing factor]