That which enters into a compound, or is a component part of any combination or mixture; an element; a constituent. "By way of analysis we may proceed from compounds to ingredients." (Sir I. Newton) "Water is the chief ingredient in all the animal fluids and solids." (Arbuthnot)

Origin: F. Ingredient, L. Ingrediens, -entis, entering into, p. Pr. Of ingredi, p. P. Ingressus, to go into, to enter; pref. In- in + gradi to walk, go. See Grade.

(01 Mar 1998)