Great word, Doc. The OED suggests that an earlier meaning of comedo is the small worms that devour a body, (maggots?). Anyway, the German term for comedo is Mitesser which is a fine example of a calque or loan translation. The prefix com- in Latin meaning the same as the German mit 'together, with' and the edo, edere, meaning the same as essen 'to eat', and in fact the two later words are cognate. A favorite calque of mine is luna de miel in Spanish for honeymoon.