QUADRILATERAL n.
ea defended by four fortresses supporting each other; as, the Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and Legnano. Complete quadrilateral (Geom.), the figure made up of the six straight lines that can be drawn through four points, A., B, C, I, the lines being supposed to be produced indefinitely.…
QUEEN n.
the widow of a king. -- Queen gold, formerly a revenue of the queen consort of England, arising from gifts, fines, etc. -- Queen mother, a queen dowager who is also mother of the reigning king or queen. -- Queen of May. See May queen, under May. -- Queen of the meadow (Bot.), a European herbaceous plant (Spiræa Ulm…
QUILLWORT n.
enus Isoetes, cryptogamous plants with a cluster of elongated four-tubed rushlike leaves, rising from a corm, and containing spores in their enlarged and excavated bases. There are about seventeen American species, usually growing in the mud under still, shallow water. So called from the shape of the shape of the leave…
REFRACTION n. 2 definitions
, and, consequently, in the apparent position of a heavenly body from which it emanates, arising from its passage through the earth's atmosphere; -- hence distinguished as atmospheric refraction, or astronomical refraction.