The Collaborative International Dictionary of English v.0.48:
Acaudate \A*cau"date\, a. [Pref. a- not + caudate.] Tailless. [1913 Webster]WordNet (r) 3.0 (2006):
acaudate adj 1: lacking a tail or taillike appendage [syn: acaudate, acaudal] [ant: caudate, caudated]