Where does “tetraspheric” come from?

tetraspheric (English) comes from English spheric, from English -ic, from English image, from French image, from Portuguese imagem, from Spanish imagen, from Italian immagine, from Latin imāginem — in.

Ancestry of “tetraspheric”, step by step

tetraspheric traces back through two separate lines of ancestry.

via English spheric

StepLanguageWordMeaning
1EnglishsphericSpherical; Of or relating to the heavenly orbs,...
2English-icUsed to form adjectives from nouns with the...
3EnglishimageAn optical or other representation of a real...
4Frenchimagepicture, image; frame; first-person singular...
5Portugueseimagemimage; picture; figure; image; image; face
6Spanishimagenimage
7Italianimmagineimage; imago
8Latinimāginem
9Latinim-Alternative form of in-; form of "in"; in
10Latinīn-un-, non-, not
11Latinînin, at, on, upon, from (space)
12Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
13Proto-Italicenin
14Proto-Indo-Europeanh₁énin

via English tetra

StepLanguageWordMeaning
1EnglishtetraAny of numerous species of small South American...
2TranslingualTetragonopterus
3Ancient Greekπτερόνfeather; wing; Any winged creature
4Proto-Indo-Europeanpéth₂r̥wing; feather
5Proto-Indo-Europeanpeth₂-to spread out; to fly
Every word from Proto-Indo-European h₁énEvery word from Latin īn-Every word from Proto-Italic en