Celeritas /kɛ’lɛritas/ or /tʃɛ’lɛritas/ is a Latin word, translated as “swiftness” or “speed”.
It is often given as the origin of the symbol c, the universal notation for the speed of light in a vacuum, as popularized in Albert Einstein’s famous equation E = mc².  The speed of light in a vacuum is defined as 186,282 miles per second.

Tada!  Our brain trust translated all of this to mean C186…