Where does “pseudomembraneous” come from?

pseudomembraneous (English) comes from English membraneous, from Middle French membraneux, from Latin membraneus, from Latin membrāna, from Latin membrum, from Proto-Italic memzrom, from Proto-Indo-European mḗms, from Proto-Indo-European mems-.

Ancestry of “pseudomembraneous”, step by step

pseudomembraneous traces back through two separate lines of ancestry.

via English membraneous

StepLanguageWordMeaning
1EnglishmembraneousAlternative form of membranous
2Middle Frenchmembraneux
3Latinmembraneusof parchment
4Latinmembrānathe skin or membrane that covers parts of the body; especially the skin or slough of snakes
5Latinmembrumlimb of the body; member; the penis; a portion,...
6Proto-Italicmemzrom
7Proto-Indo-Europeanmḗmsflesh, meat
8Proto-Indo-Europeanmems-flesh, meat
9Proto-Indo-Europeanme-ms-
10Proto-Indo-Europeanmes-

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;...
Every word from Proto-Indo-European mes-Every word from Proto-Indo-European me-ms-Every word from Proto-Indo-European mems-