The chin is the forward pointed part of the anterior mandible (mental region) below the lower lip. A fully developed human skull has a chin of between 0.7 cm and 1.1 cm.

4 days ago · “The chin evolved largely by accident and not through direct selection, but as an evolutionary byproduct resulting from direct selection on other parts of the skull,” says study co …

Feb 16, 2026 · Humans are the only primates with a chin, leaving biologists to wonder why we acquired this unique feature. According to a new analysis of head anatomy in apes, it probably didn’t evolve …

Aug 24, 2025 · The chin is the distinct, forward-projecting part of the human face located at the bottom of the lower jaw. It is a defining feature of modern humans, setting us apart from other …

Jan 24, 2026 · The chin is one of our most familiar features, yet scientists still debate why we evolved it. Here’s a breakdown of what we know about it so far.

Feb 12, 2026 · But the evolutionary journey of Homo sapiens likely didn’t alter its trajectory thanks to the chin. If anything, we simply picked it up on our way to our final biological destination.

4 days ago · Dashiell Hammett mentioned Sam Spade’s jutting chin in the opening sentence of his novel “The Maltese Falcon.” Spade’s chin was among the facial features Hammett used to describe …

Feb 11, 2026 · That exclusive nature makes the chin well suited for identifying Homo sapiens in the fossil record. In simplest terms, a chin is a bony projection of the lower jaw.

Oct 23, 2025 · The chin is a familiar feature of the human face, serving as the defining point of the lower jaw. This bony prominence is a characteristic of human anatomy that sets Homo sapiens apart from …

The meaning of CHIN is the lower portion of the face lying below the lower lip and including the prominence of the lower jaw. How to use chin in a sentence.