in genealogy, any person to whom two or more persons claim descent; also, the most recent ancestral form or species from which two different species evolved
- Common antigen
common antigen com·mon antigen (kŏm’ən) n. A hapten that occurs in the bacterial cell wall and is shared by most gram-negative bacteria. Also called heterogenic enterobacterial antigen.
- Common applications environment
operating system (CAE) Part of X/Open, based on POSIX and C. [Details?] (2007-03-01)
- Common applications service element
Common Application Service Element
- Common basal vein
common basal vein n. A tributary to the inferior pulmonary veins that receives blood from the superior and inferior basal veins.