SOLAR

adjective Etymology: Middle English, from Latin ~is, from sol sun; akin to Old English & Old Norse sōl sun, Lithuanian saulė, Greek hēlios Date: 15th century of, derived from, relating to, or caused by the sun , measured by the earth's course in relation to the sun , 3. produced or operated by the action of the sun's light or heat , utilizing the sun's rays especially to produce heat or electricity