Emily Dickinson Lexicon

CO-EF-FI'CIENT, n.

1. That which unites in action with something else to produce the same effect.
2. In algebra, a number or known quantity put before letters, or quantities, known or unknown, and into which it is supposed to be multiplied; as, in 3 x and a x, 3 and a are the coefficients of x.
3. In fluxions, the coefficient of any generating term is the quantity which arises from the division of that term by the generated quantity. – Chambers. Bailey.