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

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

The coronal suture joins the parietal bones to the frontal bone, the lamboid suture joins them to the occipital bone, and the squamous suture joins them to the temporal bone.

From Textbooks • Jun. 19, 2013

This surface terminates externally in two processes, which are the homologues of the external orbital processes of the human frontal bone.

From Artistic Anatomy of Animals by Cuyer, ?douard