Vocabulary : Orpiment to Orseille

Orpiment : Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing.
Orpin : A yellow pigment of various degrees of intensity, approaching also to red. ;; The orpine.
Orpine : A low plant with fleshy leaves (Sedum telephium), having clusters of purple flowers. It is found on dry, sandy places, and on old walls, in England, and has become naturalized in America. Called also stonecrop, and live-forever.
Orrach : See Orach.
Orreries : of Orrery

Orrery : An apparatus which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system.
Orris : A plant of the genus Iris (I. Florentina); a kind of flower-de-luce. Its rootstock has an odor resembling that of violets. ;; A sort of gold or silver lace. ;; A peculiar pattern in which gold lace or silver lace is worked; especially, one in which the edges are ornamented with conical figures placed at equal distances, with spots between them.
Orsedew : Alt. of Orsedue
Orsedue : Leaf metal of bronze; Dutch metal. See under Dutch.
Orseille : See Archil.

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