aphaeresis

from WordNet (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}]

from 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] aphaeretic

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