type A

type A or Type A

adj.

Of or relating to a behavior pattern marked by tenseness, impatience, and aggressiveness, often resulting in stress-related symptoms such as insomnia and indigestion and possibly increasing the risk of heart disease.

n.

One who exhibits this behavior pattern.

Thesaurus

Noun

1.

type A - the blood group whose red cells carry the A antigen group A, A blood group, blood type - human blood cells (usually just the red blood cells) that have the same antigens