Phobia

Definition: An extreme, irrational, fear of something that may cause a person to panic. Examples of common phobias include fear of spiders, flying in an airplane, elevators, heights, enclosed rooms, crowded public places, and embarrassing oneself in front of other people.

Synonyms (terms occurring on more labels are shown first): phobia, phobias, phobic disorder, phobic neurosis

More information: PubMed search and possibly Wikipedia