monoamine oxidase inhibitor

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of a class of antidepressant drugs that block the action of monoamine oxidase in the brain, thereby allowing the accumulation of monoamines such as norepinephrine.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of a group of antidepressant drugs that inhibit the action of monoamine oxidase in the brain and so allow monoamines to accumulate