Rh-negative
noun
1.
See under Rh factor.
noun, Physiology.
1.
any of a type of specific antigen present on the surface of red blood cells, persons having inherited such antigens being designated Rh+ (Rh positive) and persons lacking them, a much smaller group, being designated Rh− (Rh negative) blood of Rh− persons is incompatible with Rh+ blood because of antibody reaction, and an Rh− woman who bears an Rh+ baby will have formed antibodies to the fetal blood that, unless removed from her bloodstream by apheresis in a subsequent pregnancy, will be carried across the placenta and destroy red blood cells of the next Rh+ fetus, resulting in erythroblastosis in the newborn.
noun
1.
an agglutinogen commonly found in human blood: it may cause a haemolytic reaction, esp during pregnancy or following transfusion of blood that does not contain this agglutinogen Full name rhesus factor See also Rh positive, Rh negative
noun
1.
blood that does not contain the Rh factor
2.
a person having such blood
Rh-negative adj.
Lacking an Rh factor.
Rh factor n.
Any of several substances on the surface of red blood cells that induce a strong antigenic response in individuals lacking the substance.
Rh factor
(är’āch’)
Any of several antigens present on the surface of red blood cells in most humans. People with Rh factors are classified as having a blood type that is Rh positive, while people who lack the antigen are said to be Rh negative and can produce powerful antibodies that destroy red blood cells if given a blood transfusion from an Rh-positive donor. A woman who is Rh negative and is pregnant with an Rh-positive fetus can produce antibodies that are life threatening to the fetus. See Note at blood type.
Rh factor [(ahr-aych)]
Any of several substances found on the surface of red blood cells in persons.
Note: An Rh-negative woman who gives birth to an Rh-positive baby may develop antibodies to the Rh factor during her first pregnancy. These antibodies may cause a disorder in Rh-positive babies conceived afterward that could result in the death of the infant if the condition is not recognized and treated.
Read Also:
- Rh null syndrome
Rh null syndrome n. A syndrome that is characterized by a lack of all Rh antigens, hemolytic anemia that has been compensated for by the body, and stomatocytosis.
- Rho
noun, plural rhos. 1. the 17th letter of the Greek alphabet (P, ρ). 2. the consonant sound represented by this letter. 1. Rhodesia. noun (pl) rhos 1. the 17th letter in the Greek alphabet (Ρ, ρ), a consonant transliterated as r or rh rho n. Symbol ρ The 17th letter of the Greek alphabet.
- Rhod
1. variant of rhodo- before a vowel: rhodamine. 1. Rhodesia.
- Rhoda
noun 1. a female given name. a rose, the damsel in the house of Mary, the mother of John Mark. She came to hearken when Peter knocked at the door of the gate (Acts 12:12-15).
- Rhodamine
noun, Chemistry. 1. a red dye obtained by heating an alkyl aminophenol with phthalic anhydride. 2. any of various related dyes. noun 1. any one of a group of synthetic red or pink basic dyestuffs used for wool and silk. They are made from phthalic anhydride and aminophenols