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.