Where does “nuclear family” come from?

nuclear family (English) comes from English nuclear, from Latin nū̆cleus, from Latin nuculea, from Latin -eus, from Ancient Greek -εῖος, from Proto-Indo-European -iHwós, from Proto-Indo-European -wós — Creates adjectives from verb stems.

nuclear family (English): The traditional western family unit, consisting of two parents (traditionally a mother and a father) and their children

Definitions

  1. The traditional western family unit, consisting of two parents (traditionally a mother and a father) and their children

Ancestry of “nuclear family”, step by step

nuclear family traces back through two separate lines of ancestry.

via English nuclear

StepLanguageWordMeaning
1EnglishnuclearPertaining to the nucleus of an atom; Involving...
2Latinnū̆cleus(small) nut
3Latinnuculeapertaining to a small nut
4Latin-eusargentum + API → argenteus; ferrum + API →...
5Ancient Greek-εῖοςForms adjectives, usually with a meaning of "of"...
6Proto-Indo-European-iHwós
7Proto-Indo-European-wósCreates adjectives from verb stems

via English family

StepLanguageWordMeaning
1EnglishfamilyA group of people who are closely related to one...
2Middle Englishfamylyefamily
3Latinfamiliafamily; household; A quantity of land adequate...
4Latinfamulusserving, servile; a servant, slave
5Proto-Italicfamelosservile, domestic
6Proto-Indo-Europeandʰh₁-m-eló-
7Proto-Indo-Europeandʰeh₁-to do, put, place
Every word from Proto-Indo-European -wósEvery word from Latin -eusEvery word from Ancient Greek -εῖος