Where does “dermatomic” come from?

dermatomic (English) comes from English dermatome, from English derma, from Yiddish דערמע, from Yiddish דאַרם, from Middle High German darm, from Old High German darm, from Proto-West Germanic þarm, from Proto-Germanic þarmaz — to rub, turn; to drill, pierce.

Ancestry of “dermatomic”, step by step

dermatomic traces back through two separate lines of ancestry.

via English dermatome

StepLanguageWordMeaning
1EnglishdermatomeAn instrument used surgically to remove a thin...
2Englishdermathe inner layer of the skin; the dermis; a Jewish...
3Yiddishדערמע
4Yiddishדאַרםintestine
5Middle High Germandarm
6Old High Germandarm
7Proto-West Germanicþarmintestine
8Proto-Germanicþarmazintestine
9Proto-Indo-Europeantórmosborehole
10Proto-Indo-Europeanterh₁-to rub, turn; to drill, pierce

via English ic

StepLanguageWordMeaning
1Englishicrelated or pertaining to; having the character of
Every word from Proto-Indo-European terh₁-