from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. an accent that accentuates a note by extending it slightly beyond its normal time value
from The Century Dictionary and Cyclopedia
- In music, pertaining to or emphasizing slight variations in rhythm for the sake of dynamic expression: as, agogic accent.
From Ancient Greek ἀγωγός (agōgos, "leader"). (Wiktionary)