(organic chemistry) A heterocycle composed of a cycloheptene ring in which one of the methylene (-CH₂-) groups has been replaced by an ether (-O-) group

(organic chemistry) A bicyclic heterocycle composed of a cycloheptene ring attached to an oxacycloheptene ring by a single bond

plural of oxygen waster

(colloquial, derogatory) A worthless person.

plural of waste of oxygen

(colloquial, derogatory) Synonym of waste of oxygen

(chemistry) The oxygen molecule O₂, as opposed to the element O.

Misspelling of oxacillinase.

(inorganic chemistry) The chemical compound CuO.

(inorganic chemistry) The chemical compound Ag₂O.