Linguistic \Lin*guis"tic\ (l[i^][ng]*gw[i^]s"t[i^]k), Linguistical \Lin*guis"tic*al\ (-t[i^]*kal), a. [Cf. F. linguistique.]

Of or pertaining to language; relating to linguistics, or to the affinities of languages.

Source: Webster's Revised Unabridged Dictionary (1913)