WordReference Random House Unabridged Dictionary of American English © 2025
ad•sci•ti•tious
(ad′si tish′əs),USA pronunciation adj.
ad′sci•ti′tious•ly, adv.
- added or derived from an external source;
additional.
- Latin a(d)scīt(us) derived, assumed, foreign (past participle of a(d)scīscī), equivalent. to ad- ad- + scī- (stem of scīre to know) + -tus past participle suffix + -itious
- 1610–20