| ANTITOXINS | • antitoxins n. Plural of antitoxin. • ANTITOXIN n. an antidote to a toxin. |
| AXIOLOGIES | • axiologies n. Plural of axiology. • AXIOLOGY n. the science of the ultimate nature of values. |
| AXIOLOGIST | • axiologist n. A person, especially a philosopher, who studies theory of value. • AXIOLOGIST n. one who studies ultimate values. |
| AXIOMATICS | • axiomatics n. The study of all the axioms associated with a particular subject. • AXIOMATICS n. the study of axioms and axiom systems. |
| AXIOMATISE | • axiomatise v. Alternative spelling of axiomatize. • AXIOMATISE v. to make axiomatic, also AXIOMATIZE. |
| EXCISIONAL | • excisional adj. Performed by excision. • EXCISIONAL adj. relating to the act of excision. |
| EXPIATIONS | • expiations n. Plural of expiation. • EXPIATION n. the act of expiating. |
| HELIOTAXIS | • heliotaxis n. (Biology) Phototaxis related to the sun. • HELIOTAXIS n. the response of an organism to the sun's rays. |
| OXACILLINS | • oxacillins n. Plural of oxacillin. • OXACILLIN n. a semisynthetic penicillin, used in the treatment of penicillin-resistant conditions. |
| OXIDATIONS | • oxidations n. Plural of oxidation. • OXIDATION n. the act of oxidizing. |
| OXIDISABLE | • oxidisable adj. (British spelling) Alternative spelling of oxidizable. • OXIDISABLE adj. that can be oxidised, also OXIDIZABLE. |
| OXYURIASIS | • oxyuriasis n. Pinworm infection; enterobiasis. • OXYURIASIS n. pinworm infestation. |
| SAXICOLINE | • saxicoline adj. Synonym of saxicolous. • SAXICOLINE adj. inhabiting or growing among rocks, also SAXICOLOUS. |
| SAXITOXINS | • saxitoxins n. Plural of saxitoxin. • SAXITOXIN n. a nerve poison found in molluscs feeding on dinoflagellates of the genus Gonyaulax. |