mentoanterior position

[mĕn′tō-ăn-tîrē-ər]
n.
  1. A cephalic presentation of the fetus with the chin pointing to either the right or left front quarter of the mother's pelvis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.