Definition from Wiktionary, the free dictionary
See also dactyl-
From Ancient Greek δάκτυλος (daktulos, “a finger”), three bones of the finger corresponding to three syllables.
dactyl (plural dactyls)
- A poetical foot of three syllables (— ~ ~), one long followed by two short, or one accented followed by two unaccented.
poetical foot of three syllables