English
anerythrism
From an- + erythr- + -ism.
Formed from an- + erythr- + -ism
Proto-Indo-European *h₂en- ‘on, onto’
Proto-Germanic *ana- ‘on’
Proto-West Germanic *ana- ‘Forming verbs and adjectives from participles…’
English an-
Today it means
noun Absence of red pigment; applied to certain snakes.
Language periods are conventional ranges, not dates for this word.
Etymograph / anerythrism