- 2. Circle, orbit, circuit, ring.
- 3. Wheel, disk, circle.
- 4. Revolution, period.
Orbicular, a.
- 1. Spherical, globular, globated, globous, globose, round, orbed, orbic.
- 2. Circular, orbed, round.
Orbit, n.
- 1. Orb, circular path (of a celestial body).
- 2. (Anat.) Cavity of the eye.
Orchestra, n.
- 1. Place for musicians (as in a theatre).
- 2. Band of instrumental musicians (in an orchestra).
Orchotomy, n. (Med.) Emasculation, castration.
Ordain, v. a.
- 1. Appoint, call, elect, consecrate, destine, set apart.
- 2. Establish, institute, regulate.
- 3. Decree, enact, order, prescribe, enjoin.
- 4. Appoint, constitute.
Ordeal, n. Trial, test, touchstone, proof, assay, experiment, scrutiny, probation.
Order, n.
- 1. Method, regularity, symmetry, regular arrangement, disposition.
- 2. Fit condition, proper state.