c (EN)
letter, symbol, symbol

This word can also be a form of:
C (letter, noun, Proper noun, numeral, symbol)

letter “c”

c
  1. the lowercase form of the letter "C"
    The word "cat" starts with the letter "c".

symbol “c”

c
  1. centi- (a prefix used in measurements to indicate one hundredth)
    A cm is one hundredth of a meter.

symbol “c”

c
  1. the speed of light
    The energy can be calculated using the famous equation E=mc².