Even so, the necro- and the -logy word roots are familiar to folks in the natural sciences. Indeed I'd say the roots are familar to the general populace, and we're comfortable assuming that we'd be understood if we compare and contrast necromancy w/ necrology. Or that necrology would result in necropsies and vice versa. I should assert that a third meaning of the word necrology would be the study of death or decomposition. Necrology is the logical opposite of biology.
Still, I observe that Meriam Webster does not yet agree with me.