Nelson-Denny Practice Test - Prep, Practice Exam & Study Guide

The term that refers to a foreigner or foreign national is "alien." This word specifically denotes individuals who are not citizens or nationals of a particular country, highlighting their foreign status. In legal contexts, "alien" is commonly used to differentiate between someone born in the country and those who have immigrated from other nations.

The other options do not relate to the concept of foreign nationality. "Contaminant" typically refers to a substance that makes something impure or harmful, particularly in contexts like environmental science or chemistry. "Dissection" is a term associated with the process of dissecting organisms for study, often in a biological or anatomical setting. Lastly, "diverse" describes a variety or difference, often in relation to cultural, social, or biological contexts, but it doesn't specifically denote a foreign national. Thus, "alien" is the appropriate term to indicate someone from another country.