Where does “lactoproteid” come from?

lactoproteid (English) comes from English proteid, from English protein, from French protéine, from French -ine, from French -é, from Middle French -é, from Old French -é, from Latin -a.

Ancestry of “lactoproteid”, step by step

lactoproteid traces back through two separate lines of ancestry.

via English proteid

StepLanguageWordMeaning
1EnglishproteidA protein; Of or pertaining to proteins;...
2EnglishproteinAny of numerous large, complex naturally-produced...
3Frenchprotéineprotein
4French-inefeminine singular of -in; female equivalent of...
5Frenchpast participle root verb suffix of regular -er...
6Middle Frenchpast participle root verb suffix of regular; -ed, -en, -n
7Old Frenchused to form past participles of regular -er...
8Latin-asuffixed to the roots of verbs, forms agent...
9Proto-ItalicForms masculine agent nouns from prefixed or compounded bases
10Proto-Indo-European-éh₂

via English lacto

StepLanguageWordMeaning
1Englishlacto
Every word from Proto-Indo-European -éh₂
lactoproteid — Etymology, Origin & Word History | Etymology Explorer