added or derived from an external source; additional.
Origin: 1610–20; < L a(d)scīt(us) derived, assumed, foreign (ptp. of a(d)scīscī), equiv. to ad-ad-+ scī- (s. of scīre to know) + -tus ptp. suffix + -itious
ad·sci·ti·tious (ād'sĭ-tĭsh'əs) adj. Not inherent or essential; derived from something outside.
[From Latin adscītus, past participle of adscīscere, to adopt : ad-, ad- + scīscere, to accept, inchoative of scīre, to know; see skei- in Indo-European roots.]