The phrase "nuclear family" refers to a family unit consisting of a couple and their children, which is the most commonly recognized family structure within Western cultures. However, there are other synonyms for this concept, including "traditional family," "two-parent family," and "conjugal family." These terms all denote a family structure that adheres to social norms and expectations, where the parents are married, residing together, and raising their biological or adopted offspring. Other synonymous phrases for the nuclear family include "core family," "immediate family," and "basic family unit." Ultimately, each of these phrases highlights the importance of the family unit as the foundation of any society.