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solanine
solanum
solar
solar apex
solar battery
solar cell
solar constant
solar cycle
solar day
solar eclipse
solar energy
solar flare
solar furnace
solar gain
solar heating
solar month
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solar day
so·lar day (plural so·lar days)


noun 
Definition:
 
one rotation of Earth: the time taken for the Earth to make a complete revolution on its axis, measured with respect to the Sun
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