Where does “heptanuclear” come from?

heptanuclear (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.

heptanuclear (English): Having, or involving seven nuclei

Definitions

  1. Having, or involving seven nuclei

Ancestry of “heptanuclear”, step by step

heptanuclear 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 hepta

StepLanguageWordMeaning
1Englishheptaseven
Every word from Proto-Indo-European -wósEvery word from Latin -eusEvery word from Ancient Greek -εῖος