a symbol (') used in the writing of Greek to indicate that the initial vowel over which it is placed is unaspirated.
- Compare rough breathing.
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How to use smooth breathing in a sentence
The one exception is the rough breathing before Ἀνδρασι in footnote 17, which should be a smooth breathing.The Life and Writings of Henry Fuseli, Volume I (of 3) | John Knowles
British Dictionary definitions for smooth breathing
(in Greek) the sign (᾿) placed over an initial vowel, indicating that (in ancient Greek) it was not pronounced with an h: Compare rough breathing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012