Aheterosexual couple living in the same household and raising children is defined as a(n) family

nuclear

Explanation:

The term “nuclear” comes from Latin “nux” which means nut. A nuclear family refers to a household that contains parents ( of both sexes - mother and father) and their children (adopted or their own). Their goal is to spend as much quality time together  as possible in  order  to maintain good family relationships. Conflicts rarely happen  in nuclear families as it is in their best interest to lead a peaceful life.

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