| COOPTION | • cooption n. A cooptation. • co-option n. Alternative spelling of cooption. • COOPTION n. the act of coopting, also COOPTATION. |
| CORONOID | • coronoid adj. (Anatomy) Shaped like the beak of a crow. • coronoid n. (Anatomy) A slender bone that forms part of the lower jaw of primitive vertebrates. • coronoid n. (Organic chemistry) Any polycyclic aromatic hydrocarbon derived from coronene. |
| DIOBOLON | • diobolon n. (Historical) A Greek copper coin of the mid-19th century. • DIOBOLON n. (Greek) an ancient Greek coin, also DIOBOL. |
| IRONWOOD | • ironwood n. Any of numerous tree species known locally for having a particularly solid wood, or the wood of such species itself. • IRONWOOD n. a species of Australian eucalyptus, also IRONBARK. |
| ISODOMON | • isodomon n. A form of masonry in which the vertical joint of each course is in the middle of the block beneath. • ISODOMON n. a type of masonry, also ISODOMUM. |
| ODONTOID | • odontoid adj. Resembling a tooth, especially in shape. • odontoid n. A separate bone, in many reptiles, corresponding to the odontoid process. • ODONTOID n. a toothlike projection from the second vertebra of the neck. |
| OINOLOGY | • oinology n. Alternative form of oenology. • OINOLOGY n. the study of wines, also OENOLOGY, ENOLOGY. |
| OKIMONOS | • okimonos n. Plural of okimono. • OKIMONO n. (Japanese) a Japanese ornament. |
| OOGONIAL | • oogonial adj. Of or pertaining to an oogonium. • oögonial adj. Alternative spelling of oogonial. • OOGONIAL adj. relating to oogonia, the female reproductive organs in fungi or seaweed. |
| OOGONIUM | • oogonium n. (Biology) An immature ovarian egg within a developing fetus. • oogonium n. (Botany, mycology) A sac (the female gametangium) containing oospheres in algae or fungi. • oögonium n. Alternative spelling of oogonium. |
| ZOONOMIA | • zoonomia n. Synonym of zoonomy. • ZOONOMIA n. animal physiology, also ZOONOMY. |
| ZOONOMIC | • zoonomic adj. Of or pertaining to zoonomy. • ZOONOMIC adj. relating to zoonomia, animal physiology. |
| ZOONOSIS | • zoonosis n. (Biology, microbiology) An animal disease, such as rabies or anthrax, that can be transmitted to humans. • zoönosis n. Alternative form of zoonosis. • ZOONOSIS n. an animal disease which is infectious to humans. |
| ZOONOTIC | • zoonotic adj. Relating to, or having a zoonosis. • zoonotic n. Synonym of zoonosis. • ZOONOTIC adj. of or like zoonosis, a disease of animals such as rabies that can be transmitted to humans. |
| ZOOTOXIN | • zootoxin n. A toxin produced by an animal. • ZOOTOXIN n. a toxin produced by an animal. |