| QUARANTINES | • quarantines n. Plural of quarantine. • QUARANTINE v. to detain in or exclude by quarantine. |
| QUATERNIONS | • quaternions n. Plural of quaternion. • QUATERNION n. a set or group of four; the operation of changing one vector into another, or the quotient of two vectors. |
| BARQUANTINES | • BARQUANTINE n. a three-masted vessel, also BARKANTINE, BARKENTINE, BARQUENTINE. |
| BARQUENTINES | • barquentines n. Plural of barquentine. • BARQUENTINE n. a three-masted vessel, with the foremast square-rigged, and the mainmast and mizzenmast fore-and-aft-rigged, also BARKANTINE, BARKENTINE, BARQUANTINE. |
| ENQUIRATIONS | • ENQUIRATION n. (dialect) inquiry, also INQUIRATION. |
| TRANQUILNESS | • tranquilness n. The state or quality of being tranquil; tranquillity. • TRANQUILNESS n. the state of being tranquil. |
| QUATERNIONIST | • quaternionist n. One who studies or promotes the use of quaternions. • QUATERNIONIST n. a person who studies quaternions. |
| QUESTIONNAIRE | • questionnaire n. A form containing a list of questions; a means of gathering information for a survey. • questionnaire v. To survey using questionnaires. • QUESTIONNAIRE n. a set of questions for obtaining statistically useful or personal information from individuals. |
| ANTHRAQUINONES | • anthraquinones n. Plural of anthraquinone. • ANTHRAQUINONE n. a chemical used in the manufacture of some dyes. |
| FREQUENTATIONS | • frequentations n. Plural of frequentation. • FREQUENTATION n. the act of frequenting. |
| QUATERNIONISTS | • quaternionists n. Plural of quaternionist. • QUATERNIONIST n. a person who studies quaternions. |
| QUESTIONNAIRES | • questionnaires n. Plural of questionnaire. • QUESTIONNAIRE n. a set of questions for obtaining statistically useful or personal information from individuals. |
| TRANQUILNESSES | • TRANQUILNESS n. the state of being tranquil. |
| QUINCENTENARIES | • quincentenaries n. Plural of quincentenary. • QUINCENTENARY n. a five-hundredth anniversary, also QUINGENTENARY. |
| QUINGENTENARIES | • QUINGENTENARY n. a five-hundredth anniversary, also QUINCENTENARY. |
| REACQUAINTANCES | • reacquaintances n. Plural of reacquaintance. • REACQUAINTANCE n. a new acquaintance. |
| SESQUICENTENARY | • sesquicentenary n. A 150-year anniversary. • SESQUICENTENARY n. a hundred and fiftieth anniversary. |