We found one dictionary that defines the word relay satellite:

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1. relay satellite: Encyclopedia

Phrases: tracking and data relay satellite, Tracking and Data Relay Satellite System, more... ▸ Words similar to relay satellite ▸ Usage examples for relay satellite ▸ Idioms related to relay satellite ▸ Wikipedia articles (New!) ▸ Words that often appear near relay satellite ▸ Rhymes of relay satellite ▸ Invented words related to relay satellite