Polyacoustic, pol-i-a-kowst′ik, adj. multiplying or magnifying sound.—n. an instrument for effecting this.
Polyact, pol′i-akt, adj. having numerous rays.—Also Polyac′tinal.
Polyad, pol′i-ad, n. (chem.) an element whose valence is greater than two.
Polyadelph, pol′i-a-delf, n. a plant having its stamens united in three or more bundles by the filaments.—n.pl. Polyadel′phia, the 18th class in the Linnæan system.—adjs. Polyadel′phian, Polyadel′phous.
Polyandria, pol-i-an′dri-a, n. a class of plants in the Linnæan system, having more than twenty stamens inserted on the receptacle.—adjs. Polyan′drian, Polyan′drous.—n. Polyan′dry, the social usage of some races in certain stages of civilisation in which the woman normally forms a union with several husbands. [Gr. polys, many, anēr, andros, a man.]
Polyanthus, pol-i-an′thus, n. a kind of primrose much prized and cultivated by florists:—pl. Polyan′thuses.—n. Polyan′thea, a note-book for keeping choice quotations. [Gr. polys, many, anthos, a flower.]
Polyarchy, pol′i-ar-ki, n. government by many persons of whatever class.—n. Pol′yarchist. [Gr. polys, many, archein, to rule.]
Polyatomic, pol-i-a-tom′ik, adj. (chem.) noting elements or radicals with an equivalency greater than two: with more than one atom in the molecule.
Polyautography, pol-i-aw-tog′ra-fi, n. the art of multiplying copies of one's own handwriting.
Polybasic, pol-i-bā′sik, adj. (chem.) capable of combining with more than two univalent bases.