What is the origin of amphiscians?
Amphiscians is an altogether strange word, at least in its meaning. The English word, a plural noun, comes from Medieval Latin Amphisciī “those who cast a shadow on both sides,” i.e., in the tropics a person’s shadow will fall towards the north or towards the south depending on whether the sun is above or below the equator. Amphisciī is a straightforward borrowing of Greek amphískioi (a plural adjective used as a noun) “casting a shadow or shadowy on both sides,” formed from the preposition and prefix amphí, amphi- “around, about” (akin to Latin ambi- with the same meaning) and the noun skiá “shadow, shade, specter” (from the same Proto-Indo-European root from which English has shine). (Heteroscians is, of course, the opposite of amphiscians.) Amphiscians entered English in the 17th century.