The Collaborative International Dictionary of English v.0.48:
aphaeresis \a*phaer"e*sis\, Aphaeresis \A*ph[ae]r"e*sis\(?; 277), n. [L.] Same as Apheresis. [1913 Webster] aphaereticWordNet (r) 3.0 (2006):
aphaeresis n 1: (linguistics) omission at the beginning of a word as in `coon' for `raccoon' or `till' for `until' [syn: aphaeresis, apheresis]