'Labialize' definitions:

Definition of 'labialize'

(from WordNet)
verb
Pronounce with rounded lips [syn: round, labialize, labialise]

Definition of 'Labialize'

From: GCIDE
  • Labialize \La"bi*al*ize\, v. t. (Phonetics) To modify by contraction of the lip opening. [1913 Webster]