1. (chemistry) the amount of free acid present in fat as measured by the milligrams of potassium hydroxide needed to neutralize it; - Example: "as the glycerides in fat slowly decompose the acid value increases"
WordNet (r) 3.0 (2006):
acid value
n 1: (chemistry) the amount of free acid present in fat as
measured by the milligrams of potassium hydroxide needed to
neutralize it; "as the glycerides in fat slowly decompose
the acid value increases"