heteroscian
noun[Gr. other, and shadow.]
Those inhabitants of the earth are called Heteroscians, whose shadows fall one way only. Such are those who live between the tropics and the polar circles. The shadows of those who live north of the tropic of Cancer, fall northward; those of the inhabitants south of the tropic of Capricorn, fall southward; whereas the shadows of those who dwell between the tropics fall sometimes to the north and sometimes to the south.