Dactyl

A poetical foot of three sylables (-- ~ ~), one long followed by two short, or one accented followed by two unaccented; as, L. tegm/n/, E. mer\b6ciful; -- so called from the similarity of its arrangement to that of the joints of a finger.

A finger or toe; a digit.

The claw or terminal joint of a leg of an insect or crustacean.

a metrical unit with stressed-unstressed-unstressed syllables