NEWTONIAN a.
; -- applied to the doctrine of the universe as expounded in Newton's "Principia," to the modern or experimental philosophy (as opposed to the theories of Descartes and others), and, most frequently, to the mathematical theory of universal gravitation. -- Newtonian telescope (Astron.), a reflecting telescope, in which…
OBOE n.
One of the higher wind instruments in the modern orchestra, yet of great antiquity, having a penetrating pastoral quality of tone, somewhat like the clarinet in form, but more slender, and sounded by means of a double reed; a hautboy. Oboe d'amore Etym: [It., lit., oboe of love], and Oboe di caccia Etym: [It., lit., ob…
OPEN DOOR n.
In modern diplomacy, opportunity for political and commercial intercourse open to all upon equal terms, esp. with reference to a nation whose policy is wholly or partially fixed by nations foreign to itself, or to territory newly acquired by a conquering nation. In this sense, often used adjectively, as, open-door syst…