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Definition of Rtlt
1. Noun. The elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point.
Lexicographical Neighbors of Rtlt
RSV test RT RT3 RTA RTB RTD RTECS RTF RTFA RTG | RTGs RTH RTHK RTL RTLT RTM RTO RTOS RTP RTS | RTT RTTI RTTIs RTTs RTU RTÉ RUB RUC |