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

See Examples For:

frontal bone

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 ● Jan. 2, 2024

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 ● Jun. 13, 2023

Based on these techniques, the researchers concluded the human frontal bone and tibia were buried in Tam Pà Ling sometime between 86,000 and 68,000 years ago.

From Science Magazine ● Jun. 13, 2023

During early childhood, the mastoid process enlarges, the two halves of the mandible and frontal bone fuse together to form single bones, and the paranasal sinuses enlarge.

From Textbooks ● Jun. 19, 2013

The treatment consists in trephining through the frontal bone or through the temporal fossa, according to the site of the abscess and its seat of origin.

From Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. by Miles, Alexander