A reflector in a periscope, also used to signal in heliography

Let's find possible answers to "A reflector in a periscope, also used to signal in heliography" crossword clue. First of all, we will look for a few extra hints for this entry: A reflector in a periscope, also used to signal in heliography. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.