Meaning of delabialize

de•la•bi•al•ize

Pronunciation: (dē-lā'bē-u-līz"), [key]
— v., -ized, -iz•ing.
—v.t.
  1. to deprive (a sound) of labial character, as in unrounding a vowel.
—v.i.
  1. (of a speech sound) to lose its labial character.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.