Plaster cast, a copy of an object obtained by pouring plaster of Paris mixed with water into a mold. Plaster of Paris. [So called because originally brought from a suburb of Paris.] (Chem.) Anhydrous calcium sulphate, or calcined gypsum, which forms with water a paste which soon sets or hardens, and is used for casts, moldings, etc. The term is loosely applied to any plaster stone or species of gypsum.Plaster of Paris bandage(Surg.), a bandage saturated with a paste of plaster of Paris, which on drying forms a perfectly fitting splint.Plaster stone, any species of gypsum. See Gypsum.

(Plas"ter), v. t. [imp. & p. p. Plastered ; p. pr. & vb. n. Plastering.] [Cf. OF. plastrer to plaster F. plâtrer.]

Plasmation to Platform

(Plas*ma"tion) n. [L. plasmatio.] The act of forming or molding. [R.] Grafton.

(Plas*ma"tor) n. [L.] A former; a fashioner. [R.] "The sovereign plasmator, God Almighty." Urquhart.

(Plas"ma*ture) n. Form; mold. [R.]

(Plas"mic) a. Of, pertaining to, or connected with, plasma; plasmatic.

(Plas"min) n. (Physiol. Chem.) A proteid body, separated by some physiologists from blood plasma. It is probably identical with fibrinogen.

(Plas*mo"di*al) a. (Biol.) Of or pertaining to, or like, a plasmodium; as, the plasmodial form of a life cycle.

(||Plas*mo"di*um) n.; pl. Plasmodia [NL. See Plasma.]

1. (Biol.) A jellylike mass of free protoplasm, without any union of amœboid cells, and endowed with life and power of motion.

2. (Zoöl.) A naked mobile mass of protoplasm, formed by the union of several amœbalike young, and constituting one of the stages in the life cycle of Mycetozoa and other low organisms.

(Plas"mo*gen) n. [Plasma + -gen.] (Biol.) The important living portion of protoplasm, considered a chemical substance of the highest elaboration. Germ plasm and idioplasm are forms of plasmogen.

(||Plas"son) n. [NL., fr. Gr. to form.] (Biol.) The albuminous material composing the body of a cytode.

It is considered simpler than protoplasm of an ordinary cell in that it has not undergone differentiation into the inner cell nucleus and the outer cell substance. Haeckel.

(Plas"ter) n. [AS., a plaster (in sense 1), fr. L. emplastrum, Gr. fr. to daub on, stuff in; in + to mold: cf. OF. plastre a plaster (in sense 2), F. plâtre. Cf. Plastic, Emplaster, Piaster.] [Formerly written also plaister.]

1. (Med.) An external application of a consistency harder than ointment, prepared for use by spreading it on linen, leather, silk, or other material. It is adhesive at the ordinary temperature of the body, and is used, according to its composition, to produce a medicinal effect, to bind parts together, etc.; as, a porous plaster; sticking plaster.

2. A composition of lime, water, and sand, with or without hair as a bond, for coating walls, ceilings, and partitions of houses. See Mortar.

3. Calcined gypsum, or plaster of Paris, especially when ground, as used for making ornaments, figures, moldings, etc.; or calcined gypsum used as a fertilizer.

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