1. The curve described by any point in a wheel rolling on a line; a cycloid; 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

1. (of shells) having a flat base and conical spire 
2. (anatomy) admitting of rotation on an axis; sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column

Derived forms: trochoids

Encyclopedia: Trochoid

• Staffa
• staffer
• Staffordshire
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• Staffordshire terrier
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• stag's garlic
• stag's-horn coral
• stage
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• stage direct
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