What does 'laminoe' as used by Gene Wolfe in Peace mean?

It is a typo or an OCR error for lamiae, the Latin plural of lamia. My hardcopy (the 2012 edition from Orb) has lamiae.

From Wiktionary:

lamia f (genitive lamiae); first declension

  1. witch who was said to suck children's blood (sort of female bogeyman)
  2. a sorceress, enchantress, witch.

Lamia was originally a Greek word, but there is no Greek plural, since there was only one Lamia in Greek myth (and the Greek plural wouldn't have been laminoe, either).