Where does “heteronucleic” come from?

heteronucleic (English) comes from English hetero, from English heterosexual, from English -sexual, from English sexual, from Latin sexuālis, from Latin sexus, from Proto-Italic seksus, from Proto-Indo-European séksus — to cut, cut off, sever.

Ancestry of “heteronucleic”, step by step

heteronucleic traces back through two separate lines of ancestry.

via English hetero

StepLanguageWordMeaning
1EnglishheteroHeterosexual: of, pertaining to, or being a...
2EnglishheterosexualSexually attracted to members of the opposite...
3English-sexualForms a noun or adjective describing a state or...
4EnglishsexualArising from the fact of being male or female;...
5Latinsexuālissexual
6Latinsexusdivision; sex; gender
7Proto-Italicseksus
8Proto-Indo-Europeanséksus
9Proto-Indo-Europeansek-to cut, cut off, sever

via English nucleic

StepLanguageWordMeaning
1EnglishnucleicReferring to the nucleus of something
2Frenchnucléiquenucleic
3French-iqueUsed to form adjectives from nouns: -ic, -ical,...
4Middle French-iqueic
5Old French-ique-ic
6Latin-icusbelonging to; derived from; of or pertaining to;...
7Proto-Italic*-ikosforms adjectives with the sense of 'of or pertaining to'
Every word from Proto-Indo-European sek-