a. [ Gr. &unr_;; peri` around + &unr_; shadow: cf. F. périscien. ] Having the shadow moving all around. [ 1913 Webster ]

{ ‖ } n. pl. [ NL. See Periscian. ] Those who live within a polar circle, whose shadows, during some summer days, will move entirely round, falling toward every point of the compass. [ 1913 Webster ]