definite integral

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An integral that is calculated between two specified limits, usually expressed in the form ∫ ^b/_a ƒ(x)dx. The result of performing the integral is a number that represents the area under the curve of ƒ(x) between the limits and the x-axis if f(x) is greater than or equal to zero between the limits.
• noun The result of an integration performed on a fixed interval.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun mathematics The integral of a function between an upper and lower limit

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the integral of a function over a definite interval