Prolate

Part of speech: adjective

Pronunciation: /ˈpɹəʊ.leɪt/

Definitions

1. An elongated shape characterized by a greater length along one axis than another, representing a variant of spherical form, and often associated with elliptical geometries where one diameter is less than the other
2. A geometric description of a structure that appears stretched along its length, typically indicating a form that enhances one dimension over another, while remaining a type of ellipse with shorter polar measurements
3. Having a shape that is extended more in one direction than another, especially referring to ellipses or spheroids that are longer than they are wide

Etymology: "Prolate" comes from Latin "prolatum," the past participle of "proferre," meaning "to extend" or "to lengthen." The Latin verb is built from "pro-" ("forward") and "ferre" ("to carry" or "to bear"), so its underlying picture is of something carried forward or stretched out. English borrowed the adjective with that sense of elongation intact, and it is the same root that gives English "profer" in the sense of putting something forward. The word is used mainly in geometry and astronomy. A prolate spheroid is the shape you get when an ellipse is rotated around its longer axis, producing something like a rugby ball or a lemon. Its opposite is "oblate," the flattened form of a squashed sphere such as a pumpkin or the Earth itself, which bulges at the equator. The two terms describe the same family of shapes, differing only in which axis is the longer one.

Synonyms: elongated, stretched

Antonyms: spherical