| OLEOGRAPHIC | • oleographic adj. Relating to oleography. • OLEOGRAPHIC adj. like an oleograph. |
| OLFACTOLOGY | • olfactology n. The chemical study of smell. • OLFACTOLOGY n. the study of the sense of smell. |
| OLFACTORIES | • olfactories n. Plural of olfactory. • OLFACTORY n. an organ or nerve concerned with the sense of smell. |
| OLFACTORILY | • olfactorily adv. In an olfactory sense. |
| OLIGARCHIES | • oligarchies n. Plural of oligarchy. • OLIGARCHY n. a government in which a few people control all power. |
| OLIGOCHAETE | • oligochaete n. Any of various hermaphroditic aquatic and terrestrial annelid worms, of the subclass Oligochaeta, that… • OLIGOCHAETE n. any worm of the Oligochaeta, chaetopods in which the locomotor organs are reduced to bristles, e.g. earthworms, etc. |
| OLIGOCHROME | • oligochrome adj. (Art) Using only a few colours. • OLIGOCHROME n. (trademark) the brand name of a light-filtering device used in photography. |
| OLIGOCLASES | • oligoclases n. Plural of oligoclase. • OLIGOCLASE n. a triclinic soda-lime feldspar, plagioclase. |
| OLIGOMEROUS | • oligomerous adj. (Biology) Having only a few members in a particular organ. • OLIGOMEROUS adj. having few parts; having fewer members than the other whorls of a flower. |
| OLIGOPOLIES | • oligopolies n. Plural of oligopoly. • OLIGOPOLY n. a market situation in which a few producers control the demand from a large number of buyers. |
| OLIGOPOLIST | • oligopolist n. A member of an oligopoly; one of a small number of sellers with undue influence over a market. |
| OLIGOTROPHY | • oligotrophy n. (Geography, a body of water) the quality of having a low level of nutrients and minerals. • OLIGOTROPHY n. the state of being oligotrophic. |