| OBO | • obo n. Alternative form of ovoo (“Mongolian cairn”). • obo phr. (Colloquial) Alternative letter-case form of OBO: or best offer. • OBO n. (Nautical) Initialism of ore-bulk-oil: designating a ship designed to be capable of carrying wet or dry cargoes. |
| OBOE | • oboe n. A soprano and melody wind instrument in the modern orchestra and wind ensemble. It is a smaller instrument… • OBOE n. a kind of woodwind instrument. |
| OBOES | • oboes n. Plural of oboe. • OBOE n. a kind of woodwind instrument. |
| OBOIST | • oboist n. Someone who plays an oboe. • OBOIST n. one who plays the oboe. |
| OBOISTS | • oboists n. Plural of oboist. • OBOIST n. one who plays the oboe. |
| OBOL | • obol n. (Historical) A silver coin of Ancient Greece. • obol n. (Historical) A weight, equivalent to one sixth of a drachma. • OBOL n. (Greek) an ancient Greek coin, also OBOLUS. |
| OBOLARY | • obolary adj. (Nonce word) Possessing only small coins; impoverished. • OBOLARY adj. extremely poor. |
| OBOLE | • obole n. (Historical) An obsolete French coin. • OBOLE n. (French) a medieval French coin. |
| OBOLES | • oboles n. Plural of obole. • OBOLE n. (French) a medieval French coin. |
| OBOLI | • oboli n. Plural of obolus. • OBOLUS n. (Latin) in the Middle Ages, various small coins including a halfpenny, also OBOL. |
| OBOLS | • obols n. Plural of obol. • OBOL n. (Greek) an ancient Greek coin, also OBOLUS. |
| OBOLUS | • obolus n. A silver coin minted in Ancient Greece, valued at a sixth of a drachma. • obolus n. (Historical) A unit of weight, equal to one-sixth of a drachma. • obolus n. Alternative form of obelus. |
| OBOS | • OBO n. a vessel for carrying oil and bulk ore. |
| OBOVATE | • obovate adj. (Botany, mycology) Shaped like an egg, with the broad extremity located away from the base. • OBOVATE adj. of a leaf, egg-shaped in outline, with the narrow end next to the base. |
| OBOVATELY | • obovately adv. In an obovate manner. • OBOVATE adv. of a leaf, egg-shaped in outline, with the narrow end next to the base. |
| OBOVOID | • obovoid adj. Approximately obovate in shape. • OBOVOID adj. ovoid with the narrow end at the base. |