occipitomental diameter


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oc·cip·i·to·men·tal di·am·e·ter

the diameter of the fetal head from the external occipital protuberance to the midpoint of the chin.

oc·cip·i·to·men·tal di·am·e·ter

(ok-sip'i-tō-men'tăl dī-am'ĕ-tĕr)
The diameter of the fetal head from the external occipital protuberance to the midpoint of the chin.

occipitomental diameter

The greatest distance between the most prominent portion of the occiput and the point of the chin (about 13.5 cm).
See also: diameter