Definition

1. Noun:
   • A blood group classification: "Type A" refers to one of the major human blood groups in the ABO system. It is characterized by red blood cells that have the A antigen on their surface and plasma that contains anti-B antibodies.

Usage

• "Type A" is used as a compound noun to specify a blood type. It is typically written with a capital 'A'.
• It is commonly used in medical, healthcare, and donation contexts.
• Example:
• Example:

Advanced Usage

• "Type A positive" (A+) and "Type A negative" (A-) are more specific classifications that include the Rhesus (Rh) factor.
  • Example: She discovered she was type A negative, a relatively rare blood type.

Variants and Related Words

• Blood type: The general term for classifications like A, B, AB, and O.
• ABO system: The classification system that includes type A, B, AB, and O blood groups.
• Antigen: A substance, like the A antigen, that can trigger an immune response.
• Antibody: A protein produced by the body, like anti-B antibodies in type A individuals, to fight specific antigens.

Synonyms

• Blood group A: A formal synonym.
• Group A: A common shorthand in medical contexts.

Notes

• "Type A" should not be confused with the informal personality descriptor "Type A personality," which refers to a competitive, driven behavioral pattern. The context usually makes the meaning clear.
• In genetics, it can refer to the alleles (IA) that determine this blood type.

Noun

1. the blood group whose red cells carry the A antigen