(psychology) A form of depression associated with the lack of natural light during the winter months.

(medicine, psychology) A mental disorder characterized by an obsessive compulsion to repeatedly perform trivial or meaningless actions.

Alternative form of post-traumatic stress disorder

(psychiatry) Behavior that borders both neurosis and psychosis.

(medicine) Recurrent binge eating, but without the purging associated with bulimia nervosa

(medicine) Any disorder characterised by symptoms associated with autism.

A syndrome formerly thought to affect children only, but now known also to affect adults, that is characterized by frequent, chronic distractibility, and either inattentiveness or hyperactivity (fidgeting).

A mysterious and widespread phenomenon of the sudden disappearance of colonies of bees.

A severe form of premenstrual syndrome, associated primarily with the luteal phase of the menstrual cycle, and characterized by feelings of despair or anxiety, panic attacks and mood swings, irritability, apathy, and various physical aberrations.

plural of gender identity disorder