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Designating a photomechanical process for making reproductions in natural colors by three printings.

A lactone obtained by reduction of phthalyl chloride, as a white crystalline substance; hence, by extension, any one of the series of which phthalide proper is the type. [Written also phthalid.]

A colorless crystalline substance obtained by reduction from phthaleïn, into which it is easily converted by oxidation; hence, any one of the series of which phthalin proper is the type.

undifferentiated mass of protoplasm to a well-developed and much- branched mycelium. Reproduction is mainly sexual, by the formation of conidia or sporangia; but the group shows every form of transition from this method through simple conjugation to perfect sexual reproduction by egg and sperm in the higher forms. -- P…

An abnormal or excessive production of leaves.

A crystalline substance, (C2H4NH)2, formed by action of ammonia on ethylene bromide, by reduction of pyrazine, etc. It is a strong base, and is used as a remedy for gout.

plants; esp., in the United States and West Indies, a large estate appropriated to the production of the more important crops, and cultivated by laborers who live on the estate; as, a cotton plantation; a coffee plantation.

antibiotic resistance; they are exploited in genetic engineering as the vehicles for introduction of extraneous DNA into cells, to alter the genetic makeup of the cell. The cells thus altered may produce desirable proteins which are extracted and used; in the case of genetically altered plant cells, the altered cells m…

, a soft, dull black powder, consisting of finely divided metallic platinum obtained by reduction and precipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer. -- Platinum lamp (Elec.), a kind of incandescent lamp of which the luminous medium is platinum. See under Incandesc…

branch of political science or philosophy which treats of the sources, and methods of production and preservation, of the material wealth and prosperity of nations.

The production of two or more embryos in one seed, due either to the existence and fertilization of more than one embryonic sac or to the origination of embryos outside of the embryonic sac.

A literary production composed of parts brought together without order or bond of connection.

A introductory portion; an introduction or preface, as to a book, document, etc.; specifically, the introductory part of a statute, which states the reasons and intent of the law.

An introduction. [Obs.]

roductory to a discourse, or written as introductory to a book or essay; a proem; an introduction, or series of preliminary remarks. This superficial tale Is but a preface of her worthy praise. Shak. Heaven's high behest no preface needs. Milton.

To play an introduction or prelude; to give a prefatory performance; to serve as prelude. The musicians preluded on their instruments. Sir. W. Scott. We are preluding too largely, and must come at once to the point. Jeffrey.

o that of England. -- Prime mover. (Mech.) (a) A natural agency applied by man to the production of power. Especially: Muscular force; the weight and motion of fluids, as water and air; heat obtained by chemical combination, and applied to produce changes in the volume and pressure of steam, air, or other fluids; and…

Being of the first production; primitive; original. [Obs.] Ainsworth.

s, the principal officers of a Government; the principal men of a state; the principal productions of a country; the principal arguments in a case. Wisdom is the principal thing. Prov. iv. 7.

The act of begetting; generation and production of young. South.