rough breathing

noun

Definition of rough breathing 

1 : a mark ʽ used in Greek over some initial vowels to show that they are aspirated or over ρ to show that it is voiceless

2 : the sound indicated by a mark ʽ over a Greek vowel or ρ

First Known Use of rough breathing

1696, in the meaning defined at sense 1

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The first known use of rough breathing was in 1696

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