nuclear family
US /ˌnuː.kli.ər ˈfæm.əl.i/
UK /ˌnuː.kli.ər ˈfæm.əl.i/

1.
familia nuclear
a couple and their dependent children, regarded as a basic social unit.
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The nuclear family is often seen as the traditional family structure.
La familia nuclear a menudo se considera la estructura familiar tradicional.
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In many Western societies, the nuclear family is the most common household arrangement.
En muchas sociedades occidentales, la familia nuclear es la disposición doméstica más común.