People who live in tropical regions where the sun can be overhead and their shadows fall in different directions at different times of year.
From Greek 'amphi' (both/around) + 'skia' (shadow), an ancient geographical term used by Greek scholars to describe tropical inhabitants.
The ancient Greeks used the concept of amphiscians to prove the Earth was round—they realized that people in different latitudes had shadows falling in different directions, which only makes sense on a sphere.
Complete word intelligence in one call. Free tier — 50 lookups/day.