| ANTIQUARIANS | • antiquarians n. Plural of antiquarian. • ANTIQUARIAN n. one who collects or studies antiquities. |
| AQUAFORTISES | • AQUAFORTIS n. concentrated nitric acid, used for etching. |
| AQUAFORTISTS | • aquafortists n. Plural of aquafortist. • AQUAFORTIST n. an etcher or engraver who uses aquafortis. |
| AQUARELLISTS | • aquarellists n. Plural of aquarellist. • AQUARELLIST n. an artist painting aquarelles. |
| BARQUANTINES | • BARQUANTINE n. a three-masted vessel, also BARKANTINE, BARKENTINE, BARQUENTINE. |
| BIQUADRATICS | • biquadratics n. Plural of biquadratic. • BIQUADRATIC n. a quantity twice squared, or raised to the fourth power. |
| EQUILATERALS | • equilaterals n. Plural of equilateral. • EQUILATERAL n. a shape with all sides equal. |
| PREACQUAINTS | • preacquaints v. Third-person singular simple present indicative form of preacquaint. • PREACQUAINT v. to acquaint beforehand. |
| QUADRATRICES | • quadratrices n. Plural of quadratrix. • QUADRATRIX n. a curve by which a circle may be squared. |
| QUADRATRIXES | • quadratrixes n. Plural of quadratrix. • QUADRATRIX n. a curve by which a circle may be squared. |
| QUAESTIONARY | • quæstionary n. Rare spelling of questionary. • QUAESTIONARY n. (Scott) a religious pardoner, also QUESTIONARY. |
| QUAESTUARIES | • QUAESTUARY n. (Latin) an ancient Roman public treasurer or assistant military commander, also QUAESTOR, QUESTOR. |
| QUASICRYSTAL | • quasicrystal n. (Physics, chemistry) any solid with conventional crystalline properties but exhibiting a point group… • quasi-crystal n. Alternative form of quasicrystal. • QUASICRYSTAL n. a body of solid material that resembles a crystal in being composed of repeating structural units but that incorporates two or more unit cells into a quasiperiodic structure. |
| QUATERNARIES | • quaternaries n. Plural of quaternary. • QUATERNARY n. a set of four. |
| SESQUIALTERA | • sesquialtera n. (Music) A ratio of 3:2. • sesquialtera n. (Music) An organ stop that uses two ranks of different pipes. • SESQUIALTERA n. a perfect fifth; three notes against two; an organ stop giving the root, the twelfth and the tierce. |