derivation of citizenship

Definition from Nolo’s Plain-English Law Dictionary

An immigration law concept allowing children who already have U.S. green cards to obtain U.S. citizenship automatically, in most cases when one or both parents become naturalized U.S. citizens. The exact requirements depend on what laws were in effect during certain key events, in most cases the year in which the parent naturalized.

Definition provided by Nolo’s Plain-English Law Dictionary.