Morton plane

Mor·ton plane

(mōr'tŏn),
a plane passing through the summits of the parietal and occipital protuberances.

Morton plane

(mort′ŏn)
[Samuel G. Morton, U.S. physician, 1799–1851]
A plane passing through the most projecting points of the parietal and occipital protuberances.

Morton,

Samuel G., U.S. physician, 1799-1851.
Morton plane - passes through the summits of the parietal and occipital protuberances.