Surface daylight Synonyms

Definitions for Surface


  • (adjective) lying on or affecting only the outer layer of something
  • (noun) an outer part or layer
  • (verb) to come to one's attention especially gradually or unexpectedly

SD abbreviation

SD is an abbreviation for Surface Daylight
What does SD stand for?
SD stands for "Surface Daylight"

Definitions for Daylight


  • (noun) the first appearance of light in the morning or the time of its appearance
  • (noun) the hours of light between one night and the next
  • (noun) the time after sunrise and before sunset while it is light outside