1. The elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point
   - round-trip light time

Type of: elapsed time

Encyclopedia: RTLT

• purple nightshade
• purple onion
• purple orchis
• purple osier
• purple passage
• purple patch
• purple pea
• purple poppy mallow
• purple rock brake
• purple sage
• purple sanicle
• purple saxifrage
• purple silkweed
• purple strawberry guava
• purple trillium
• purple velvet plant
• purple virgin's bower
• purple willow
• purple-black
• purple-blue
• purple-brown
• purple-eyed
• schoolmistress
• schoolroom
• schoolteacher