Defn: A mystic syllable or ejaculation used by Hindus and Buddhists in religious rites, — orig. among the Hindus an exclamation of assent, like Amen, then an invocation, and later a symbol of the trinity formed by Vishnu, Siva, and Brahma. — Om mani padme hun, a sacred formula of buddhism (esp. of the Lamaists) translated "O, the Jewel in the Lotus, Amen," and referring to Amitabha, who is commonly represented as standing or sitting within a lotus.
-OMA -o"ma. Etym: [Gr.
Defn: A suffix used in medical terms to denote a morbid condition of some part, usually some kind of tumor; as in fibroma, glaucoma.
OMAGRA
Om"a*gra, n. Etym: [NL., fr. Gr. (Med.)
Defn: Gout in the shoulder.
OMAHAS
O"ma*has", n. pl.; sing. Omaha (. (Ethnol.)
Defn: A tribe of Indians who inhabited the south side of the Missouri
River. They are now partly civilized and occupy a reservation in
Nebraska.
OMANDER WOOD
O*man"der wood`. Etym: [Etymol. uncertain.] (Bot.)
Defn: The wood of Diospyros ebenaster, a kind of ebony found in
Ceylon.
OMASUM
O*ma"sum, n. Etym: [L.] (Anat.)