dēductiō ōnis, f deduco, a leading away, conducting off: rivorum a fonte: Albanae aquae.

—Of colonists, a leading forth, establishing, colonizing: in istos agros: militum in oppida.

—In law, an ejection, expulsion: postulasse, ut moribus deductio fieret.

—A diminution, subtraction, deduction: ne qua deductio fieret: ex omni pecuniā.

— Fig., an inference, course of reasoning: rationis.