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1. An aspirate sound in ancient Greek like that of the sound (h) in English.
2. The symbol ( ̔ ) written over some initial vowels and the letter rho in ancient Greek to indicate that a word begins with the sound (h).
3. In ancient Greek, a word beginning with the sound (h) plus a vowel or diphthong.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Phonetics & Phonology) (in Greek) the sign (῾) placed over an initial letter, or a second letter if the word begins with a diphthong, indicating that (in ancient Greek) it was pronounced with an h. Compare smooth breathing
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. the symbol (‘) used in the writing of Greek to indicate aspiration of the initial vowel or of the ρ (rho) over which it is placed.
2. the aspirated sound indicated by this mark.Compare smooth breathing.
[1740–50; translation of Latin spiritus asper]
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