autemesia

au·te·me·si·a

(aw'tĕ-mē'zē-ă), Rarely used term for:
1. Idiopathic or functional vomiting.
2. Vomiting induced by provoking the gag reflex.
[G. autos, self, + emesis, vomiting]

autemesia

(1) Self-induced vomiting. 
(2) Vomiting of unknown aetiology.