1. calorie.
2. Optics. candle; candles.
3. (with a year) about: c1775. [ circa, circiter, circum ]
4. Physics , Chem. curie; curies.
5. cycle; cycles.
Symbol.
1. Optics , Physics. the velocity of light in a vacuum: approximately 186,000 miles per second or 299,793 kilometers per second.
2. Acoustics , Physics. the velocity of sound.
(in prescriptions) with.
[ cum ]