frontal triangle
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fron·tal tri·an·gle
a triangle bounded above by the maximum frontal diameter and laterally by lines joining the extremities of this diameter with the glabella.
frontal triangle
The triangle bounded by the maximum frontal diameter and the lines joining its extremities and the glabella.
See also: triangle
fron·tal tri·an·gle
(frŏntăl trīang-gĕl)Area bounded above by maximal frontal diameter and laterally by lines joining extremities of this diameter with the glabella.