efface

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efface

(ĭ-fās′)
v. ef·faced, ef·facing, ef·faces
v.tr.
Medicine To cause to become shorter, softer, and thinner during labor: The cervix was effaced as the contractions continued.
v.intr.
Medicine To become shorter, softer, and thinner during labor. Used of the cervix.

ef·face′a·ble adj.
ef·face′ment n.
ef·fac′er n.