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dekan

noun dek·an \ ˈdekən \
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Definition of dekan

plural -s
: one of 36 equal subdivisions of the equatorial belt of the celestial sphere including the ecliptic and the stars contained in it —used in ancient Egyptian astronomy
—

dekanal

\ˈdekənᵊl\ adjective

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Origin and Etymology of dekan

Greek dekanos, from deka ten; from the ten days of each subdivision

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