Pol"y*ur`eth*ane, n. (Chem.) any polymer containing [-NH.CO.O-] linkages; such polymers are much used as the basis of light but rigid foams for packaging (polyurethane foam) and for hard coatings, as on floors.
Pol`y*u"ri*a(?), n. [NL. See Poly-, and Urine.] (Med.) A persistently excessive flow of watery urine, with low specific gravity and without the presence of either protein or sugar. It is generally accompanied with more or less thirst.
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Wed 28th October 2020