Where does “duodecanucleotide” come from?

duodecanucleotide (English) comes from English nucleotide, from English nucleo-, 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.

Ancestry of “duodecanucleotide”, step by step

duodecanucleotide traces back through two separate lines of ancestry.

via English nucleotide

StepLanguageWordMeaning
1EnglishnucleotideThe monomer constituting DNA or RNA biopolymer...
2Englishnucleo-Forming words pertaining to nuclei
3Latinnū̆cleus(small) nut
4Latinnuculeapertaining to a small nut
5Latin-eusargentum + API → argenteus; ferrum + API →...
6Ancient Greek-εῖοςForms adjectives, usually with a meaning of "of"...
7Proto-Indo-European-iHwós
8Proto-Indo-European-wósCreates adjectives from verb stems

via English duodeca

StepLanguageWordMeaning
1Englishduodeca
Every word from Proto-Indo-European -wós