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The Collaborative International Dictionary
Adscititiously

Adscititious \Ad`sci*ti"tious\, a. [L. adscitus, p. p. of adsciscere, asciscere, to take knowingly; ad + sciscere to seek to know, approve, scire to know.] Supplemental; additional; adventitious; ascititious. ``Adscititious evidence.''
--Bowring. -- Ad`sci*ti"tious*ly, adv.

Wiktionary
adscititiously

adv. In an adscititious way.