tro·​choid ˈtrō-ˌkȯid How to pronounce trochoid (audio)
: the curve generated by a point on the radius of a circle or the radius extended as the circle rolls on a fixed straight line
trochoidal adjective

Examples of trochoid in a Sentence

Recent Examples on the Web Oil is injected into the intake-manifold plenum in conventional Mazda fashion, but the 13B receives additional apex-seal lubrication from oil injected directly into the trochoid chambers. Csaba Csere, Car and Driver, 1 Feb. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'trochoid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Greek trochoeidēs like a wheel, from trochos wheel

First Known Use

circa 1704, in the meaning defined above

Time Traveler
The first known use of trochoid was circa 1704

Dictionary Entries Near trochoid

Cite this Entry

“Trochoid.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2024.

Medical Definition


tro·​choid ˈtrō-ˌkȯid How to pronounce trochoid (audio)
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