(psychology) External show of emotion or affect, such as by voice, expression, gesture, or posture, whether voluntary or not.

(medicine) Lack of emotion, or of apparent emotion.

plural of affective disorder

(psychology) Any of various disorders characterised by disturbance in an individual's mood.

a neurologic disorder characterized by episodes of uncontrollable laughing and/or crying, or other emotional displays

Misspelling of side-effect.

Misspelling of side effect.

(law) A common law tort that can be brought against the third party alleged to be responsible for the failure of marriage; abolished in many jurisdictions.

plural of flat affect

Work carried out in order to produce a specific emotional response in people.