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volvelle: a device which rotates; usually referring to one or more discs which turn within a circular scale.
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wedge: the part of an astrolabe which secures the pin; also called the 'horse'.
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wegweiser: a circle marked with the points of the compass and a rotating index.
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wind names: a nomenclature for dividing an azimuth circle into degrees, where eight 45-degree scales are allocated to eight traditional named winds of the Mediterranean.
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wind rose: type of compass rose, where the directions are indicated by the names or initials of the traditional winds of the Mediterranean. May also refer to a whole instrument serving only to indicate the names of the wind directions.
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