What is persons who, at certain times of the year, have no shadow at noon; -- applied to the inhabitants of the torrid zone, who have, twice a year, a vertical sun called?

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ascians — Persons who, at certain times of the year, have no shadow at noon; -- applied to the inhabitants of the torrid zone, who have, twice a year, a vertical sun. (Webster's 1913.)

What is persons who, at certain times of the year, have no shadow at noon; -- applied to the inhabitants of the torrid zone, who have, twice a year, a vertical sun called?

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