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.

Definition of chin noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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 18, 2026 · “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 …

to bring one's chin up to (a horizontal bar, from which one is hanging by the hands), by bending the elbows

Apr 1, 2026 · To dig into the murky origins of the human chin, we spoke to one of the study’s co-authors, Lauren Schroeder, a paleoanthropologist at the University of Toronto Mississauga.

Oct 31, 2025 · While the general shape of your chin is typically determined by genetics, age and lifestyle can change its appearance. Read on to figure out what basic chin shape you have. From there, we'll …

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 primates and …

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 …

Feb 12, 2026 · Human faces wouldn’t look complete without a chin, anatomically defined as a bony protrusion that extends from the lower jaw. Previous studies suggested that chins evolved in humans …