cycloid
Cycloid (noun) means the curve traced by a point on the rim of a circle as the circle rolls along a straight line without slipping. Example: “The valve on the wheel traces a cycloid as the bicycle rolls forward.”
How to use cycloid
Learner’s notesIn plain EnglishThe arched curve a point on a rolling wheel's rim draws.
It is a technical term, used mainly in mathematics and in describing fish.
Think of a dot on a bicycle tire: the path it traces is a cycloid.
Trace the full origin ↓Fill the gap
Can you complete this real example?
The valve on the wheel traces a _____ as the bicycle rolls forward.
Etymology
The word is formed in English from the combining form cyclo- and the suffix -oid.