trochoid.
The curve traced by a point on a circle as it rolls along a straight line
Meaning & usage
The curve traced by a point on a circle as it rolls along a straight line
An organism or fossil with a trochoid shell (especially one in the gastropod family Trochidae), or the shell itself.
Where this word comes from
From Ancient Greek τροχοειδής (trokhoeidḗs), from τροχός (trokhós, “wheel”) + εἶδος (eîdos, “form, image”).
Capable of rolling.
Allowing rotation.
High-spired; conical.
Where this word comes from
From Ancient Greek τροχοειδής (trokhoeidḗs), from τροχός (trokhós, “wheel”) + εἶδος (eîdos, “form, image”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.