Definition

Noun: A blood type characterized by the absence of the Rh factor (also known as the Rhesus or D antigen) on the surface of red blood cells. Individuals with this blood type do not naturally produce antibodies against the Rh factor unless exposed to Rh-positive blood.

Usage

This term is used primarily in medical, biological, and healthcare contexts to classify blood for transfusions, prenatal care, and genetic studies. - It is a compound noun, typically used in its hyphenated form. - It often appears in discussions about blood compatibility, pregnancy, and inheritance.

Examples

• The patient has rh-negative blood, so the medical team must ensure she receives an Rh-negative transfusion.
• During her first prenatal visit, the test revealed she had rh-negative blood.
• Rh-negative blood is less common in the general population than Rh-positive blood.

Advanced Usage

• In Medicine: The term is critical in obstetrics for managing Rh incompatibility between a mother and fetus. An Rh-negative mother carrying an Rh-positive baby may require treatment to prevent complications.
• In Genetics: The inheritance of the Rh factor is discussed, with Rh-negative being a recessive trait.

Variants and Related Words

• Rh-negative: The adjective form, used to describe the blood type or an individual possessing it (e.g., an Rh-negative donor).
• Rh factor: The antigen whose presence (Rh-positive) or absence (Rh-negative) defines the blood type.
• Rh incompatibility: A condition that can occur when an Rh-negative person is exposed to Rh-positive blood.

Synonyms

• Rh-negative type: A less common synonym focusing on the classification.
• Rh(D) negative: A more precise clinical term specifying the absence of the D antigen.

Related Phrases

• Rh-negative pregnancy: A pregnancy where the mother has Rh-negative blood.
• Rh immunoglobulin (RhIg): A medication given to Rh-negative individuals to prevent antibody formation after exposure to Rh-positive blood.

Noun

1. the blood group whose red cells lack the Rh factor (Rh antigen)