Where does “trizygous” come from?

trizygous (English) comes from English -zygous, from English ous, from English ou, from Afrikaans ou, from Dutch oud, from Middle Dutch out, from Old Dutch ald, from Proto-West Germanic ald — to grow, nourish.

Ancestry of “trizygous”, step by step

StepLanguageWordMeaning
1English-zygousHaving or originating from a specified state as a...
2Englishousplural of ou
3EnglishouA probably extinct species of Hawaiian...
4AfrikaansouAn old fellow, guy, bloke; attributive form of...
5Dutchoudold
6Middle Dutchoutold
7Old Dutchald
8Proto-West Germanicaldold
9Proto-Germanicaldazold, grown up
10Proto-Indo-Europeanh₂eltós
11Proto-Indo-Europeanh₂él-to grow, nourish
Every word from Proto-Indo-European h₂él-Every word from Proto-Indo-European h₂eltósEvery word from Proto-Germanic aldaz