rough breathing
- in written Greek, the mark (ʼ) placed over an initial vowel or ρ (rho) to show that in ancient Greek it was pronounced with a preceding (h) sound, or aspirate
- the sound thus indicated
See rough breathing in American Heritage Dictionary 4
noun- An aspirate sound in ancient Greek like that of the sound (h) in English.
- The symbol ( ῾ ) written over some initial vowels and the letter rho in ancient Greek to indicate that a word begins with the sound (h).
- In ancient Greek, a word beginning with the sound (h) plus a vowel or diphthong.