mesognathion

me·sog·nath·i·on

(me-sog'nā'thē-on), In the diphthong gn, the g is silent only at the beginning of a word.
The lateral segment of the premaxillary or incisive bone external to the endognathion.
[meso- + G. gnathos, jaw]

mesognathion

(mĕs-ŏg-nā′thē-ŏn)
A point in the lateral portion of the intermaxillary bone or premaxilla.

mes·og·nath·i·on

(mezog-nāthē-on)
Lateral segment of premaxillary or incisive bone external to the endognathion.
[G. meso- middle + G. gnathos, jaw]