Definition of mentovertical in US English:

mentovertical

adjective

Obstetrics
  • Designating the diameter of the fetal head from the chin to the highest point of the vertex.

Origin

Early 20th century. From mento- + vertical.

Pronunciation

mentovertical

/ˌmɛntə(ʊ)ˈvəːtɪkl/