(n.) A point in which the rays of light meet, after being reflected or refrcted, and at which the image is formed; as, the focus of a lens or mirror.
(n.) A point so related to a conic section and certain straight line called the directrix that the ratio of the distace between any point of the curve and the focus to the distance of the same point from the directrix is constant.
(n.) A central point; a point of concentration.
(v. t.) To bring to a focus; to focalize; as, to focus a camera.
(n.) A name of several kinds of water lilies; as Nelumbium speciosum, used in religious ceremonies, anciently in Egypt, and to this day in Asia; Nelumbium luteum, the American lotus; and Nymphaea Lotus and N. caerulea, the respectively white-flowered and blue-flowered lotus of modern Egypt, which, with Nelumbium speciosum, are figured on its ancient monuments.
(n.) The lotus of the lotuseaters, probably a tree found in Northern Africa, Sicily, Portugal, and Spain (Zizyphus Lotus), the fruit of which is mildly sweet. It was fabled by the ancients to make strangers who ate of it forget their native country, or lose all desire to return to it.
(n.) The lote, or nettle tree. See Lote.
(n.) A genus (Lotus) of leguminous plants much resembling clover.
(n.) An ornament much used in Egyptian architecture, generally asserted to have been suggested by the Egyptian water lily.