In heraldry, a variant or inverse pattern of ermine, representing ermine in reverse coloring (dark with white spots rather than white with black spots).
From 'ermine' with a French heraldic suffix '-ois,' similar to how heraldry creates technical terms for color and fur variations; this is specialized terminology used in coat-of-arms blazonry.
Heraldry is obsessed with mirror images and reversals—'erminois' is the negative of ermine, like a photographic negative, and these tiny variations in heraldic patterns communicated important distinctions between noble families.
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