ag-, agen-, act-, agi-, agit-

An in vitro test result indicating the presence, in serum, of immunologically active material, usually an antibody but sometimes an antigen.

Reacting chemically to sunlight or ultraviolet radiation.

1. Condensation of protein material by the controlled use of an intense beam of light; used especially in the treatment of retinal detachment and the destruction of abnormal retinal vessels, or of intraocular tumor masses.
2. A technique using intense light energy, as from a laser, to produce scar tissue used in treating certain eye disorders, in medical and biological research, etc.

1. Affecting the mental state, such as a drug that has that result.
2. Possessing the ability to alter mood, anxiety, behavior, cognitive processes, or mental tension; usually applied to pharmacologic (drug) agents.

Any reaction that results from saliva whether chemical, biological, or whatever.