De*duce" (?), v. t. [imp. & p. p. Deduced (?); p. pr. & vb. n. Deducing.] [L. deducere; de- + ducere to lead, draw. See Duke, and cf. Deduct.] 1. To lead forth. [A Latinism]

He should hither deduce a colony.

2. To take away; to deduct; to subtract; as, to deduce a part from the whole. [Obs.] B. Jonson.

3. To derive or draw; to derive by logical process; to obtain or arrive at as the result of reasoning; to gather, as a truth or opinion, from what precedes or from premises; to infer; -- with from or out of.

O goddess, say, shall I deduce my rhymes
From the dire nation in its early times?

Reasoning is nothing but the faculty of deducing unknown truths from principles already known.

See what regard will be paid to the pedigree which deduces your descent from kings and conquerors.

• (followed by that) To reach a conclusion by applying rules of logic to given premises.
  
  Italian
• third-person singular indicative present of dedurre