Defn: Of or pertaining to onomatopoeia; characterized by onomatopoeia; imitative; as, an onomatopoetic writer or word. Earle.

ONOMATOPY
On`o*mat"o*py, n.

Defn: Onomatopoeia.

ONOMOMANCY
O*nom"o*man`cy, n.

Defn: See Onomancy.

ONONDAGAS
On`on*da"gas, n. pl.; sing. Onondaga (. (Ethnol.)

Defn: A tribe of Indians formerly inhabiting what is now a part of the State of New York. They were the central or head tribe of the Five Nations.

ONRUSH
On"rush`, n.

Defn: A rushing onward.

ONSET
On"set`, n. Etym: [On + set.]