The Collaborative International Dictionary of English v.0.48:
Localization \Lo`cal*i*za"tion\, n. [Cf. F. localisation.] Act of localizing, or state of being localized. [1913 Webster] Cerebral localization (Physiol.), the localization of the control of special functions, as of sight or of the various movements of the body, in special regions of the brain. [1913 Webster]