Where does “pseudosylvian” come from?

pseudosylvian (English) comes from English pseudo, from English pseudo-, from Ancient Greek ψευδής, from Ancient Greek -ής, from Proto-Indo-European -ēs, from Proto-Indo-European -ess, from Proto-Indo-European -os — Creates action nouns or result nouns from verbs;...

pseudosylvian (English): Describing an extension of the lateral sulcus on...

Definitions

  1. Describing an extension of the lateral sulcus on...

Ancestry of “pseudosylvian”, step by step

pseudosylvian traces back through two separate lines of ancestry.

via English pseudo

StepLanguageWordMeaning
1EnglishpseudoAn intellectually pretentious person; a...
2Englishpseudo-False, not genuine, fake
3Ancient Greekψευδήςlying, false, untrue; deceived, beguiled
4Ancient Greek-ήςadjective suffix
5Proto-Indo-European-ēsPrimarily forms adjectival bahuvrīhi compounds
6Proto-Indo-European-ess
7Proto-Indo-European-osCreates action nouns or result nouns from verbs;...

via English Sylvian

StepLanguageWordMeaning
1EnglishSylvianOf or relating to Franciscus Sylvius (1614–1672; born Franz de le Boë), Dutch physician and scientist
2Englishān
3Middle Englishāna, an indefinite article
4Old Englishānlonely; entirely alone, solitary, single; one
5Proto-West Germanicainone
6Proto-Germanicainazone; some
7Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European -osEvery word from Ancient Greek -ήςEvery word from English pseudo-