frontal bone

American  

noun

Anatomy.

1. a broad membrane bone of the skull, forming the forehead and the upper portion of each orbit.

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frontal bone British  

noun

1. the bone forming the forehead and the upper parts of the orbits. It contains several air spaces

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Etymology

Origin of frontal bone

First recorded in 1735–45

Example Sentences

Their research supports the idea that all of the ruminant headgear forms evolved from a common ancestor as paired bony outgrowths from the animals' "forehead," the area near the frontal bones of the skull.

From Science Daily

That young T. rex is represented by a skull bone -- the frontal bone -- with distinctive features that ally it with Tyrannosaurus, but which aren't seen in Nanotyrannus.

From Science Daily

Then in 2017, in an even deeper layer, they discovered a forehead or frontal bone and a piece of shin bone, both identified from their characteristic bone shapes as belonging to our species.

From Science Magazine

They treated it by extracting part of the boy’s frontal bone, BuzzFeed reported.

From Washington Times

“We don’t have the frontal bone, browridge, face, teeth or chin region, any of which could have been less ‘modern’ in form,” he said in an email.

From Washington Post