light time

1. 1.

   distance measured in terms of the speed of light (or radio waves)

   “the light time from Jupiter to the sun is approximately 43 minutes”

   Broaderdistance

Questions about light time

What does light time mean?

light time means "distance measured in terms of the speed of light (or radio waves)".

Is light time a common word?

light time is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.