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oracle in ancient Greece, a shrine, priest, or priestess dedicated to a god and often consulted for prophecies or advice. [3 definitions]
oracular of, like, pertaining to, or having the nature of an oracle; prophetic; wise; mysterious. [3 definitions]
oral spoken, as opposed to written; accomplished by speaking. [3 definitions]
oral surgery a branch of dentistry that uses surgery as treatment for certain disorders of the teeth, gums, and jaws.
orange a spherical fruit with a reddish yellow rind and a sweet, acidic, edible pulp on the inside. [5 definitions]
orangeade a soft drink made with orange juice or orange flavoring.
Orangeman a member of a secret society of Irish Protestants that was formed in 1795. [2 definitions]
orange pekoe a black tea of India or Sri Lanka.
orangewood a hard, fine-grained wood obtained from orange trees.
orangutan a large, tree-dwelling ape of Borneo and Sumatra that has long arms and long, reddish brown hair.
orate to speak in a formal or pompous manner.
oration a formal, usu. long speech, esp. one given on an important occasion. [2 definitions]
orator a person who delivers a public speech, or one skilled at formal public speaking.
oratorical of, pertaining to, or characteristic of oratory or an orator. [2 definitions]
oratorio a musical composition for voices and orchestra without costumes or scenery, usu. dramatizing a biblical subject.
oratory1 the art of public speaking. [2 definitions]
oratory2 a small chapel or room for private worship or prayer.
orbicular shaped like an orb; spherical. [2 definitions]