Thesaurus: trochoid

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Definitions

1. n. The curve described by any point in a wheel rolling on a line; a cycloid; a roulette; in general, the curve described by any point fixedly connected with a moving curve while the moving curve rolls without slipping on a second fixed curve, the curves all being in one plane. Cycloids, epicycloids, hypocycloids, cardioids, etc., are all trochoids.
2. a. Admitting of rotation on an axis; -- sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column.
3. a. Top-shaped; having a flat base and conical spire; -- said of certain shells.
4. a. Of or pertaining to the genus Trochus or family Trochidae.
5. The curve described by any point in a wheel rolling on a line; a cycloid; a roulette; in general, the curve described by any point fixedly connected with a moving curve while the moving curve rolls without slipping on a second fixed curve, the curves all being in one plane. Cycloids, epicycloids, hypocycloids, cardioids, etc., are all trochoids. 1. (Anat.) Admitting of rotation on an axis; -- sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column. 2. (Zoöl.) Top-shaped; having a flat base and conical spire; -- said of certain shells. 3. (Zoöl.) Of or pertaining to the genus Trochus or family Trochidæ.
6. The curve described by any point in a wheel rolling on a line;a cycloid; a roulette; in general, the curve described by any pointfixedly connected with a moving curve while the moving curve rollswithout slipping on a second fixed curve, the curves all being in oneplane. Cycloids, epicycloids, hypocycloids, cardioids, etc., are alltrochoids.
7. n. The curve described by any point in a wheel rolling on a line; a cycloid; a roulette; in general, the curve described by any point fixedly connected with a moving curve while the moving curve rolls without slipping on a second fixed curve, the curves all being in one plane. Cycloids, epicycloids, hypocycloids, cardioids, etc., are all trochoids. a. Admitting of rotation on an axis; -- sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column. a. Top-shaped; having a flat base and conical spire; -- said of certain shells. a. Of or pertaining to the genus Trochus or family Trochidae.