gibbous

This term is primarily used in astronomical contexts to describe the specific phase of the moon between a half-moon and a full moon. It carries a technical, descriptive tone and is rarely used in casual conversation unless discussing lunar cycles or astronomy.

When applied to anatomy or physical objects, the word describes a rounded protrusion or a hump. In this sense, it is far more formal and literary than common terms like humpbacked or bulging, often appearing in historical texts or detailed artistic descriptions to evoke a specific visual curvature.