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) See under Ground. -- Norfolk Island pine (Bot.), a beautiful coniferous tree, the Araucaria excelsa. -- Pine barren, a tract of infertile land which is covered with pines. [Southern U.S.] -- Pine borer (Zoöl.), any beetle whose larvæ bore into pine trees. -- Pine finch. (Zoöl.) See Pinefinch, in the Vocabulary. -…

edle, the pin grass; -- so called from the long, tapering points of the carpels. See Alfilaria. -- Sea pink. See Thrift.

Any fish of the genus Fistularia; -- called also tobacco pipefish. See Fistularia.

type, two molar teeth intermediate between those of man and the anthropoids, and the calvaria of the skull, indicating a brain capacity of about 900 cubic centimeters, and resembling in form that of the Neanderthal man. Also [pl. -thropi],

A division of Turbellaria; the Dendrocoela.

Like the planarians.

class of helminthes including the cestodes, or tapeworms, the trematodes, and the turbellarians. Called also flatworms.

in such a way as to be capable of double meaning; punning. -- Play of colors, prismatic variation of colors. -- To bring into play, To come into play, to bring or come into use or exercise. -- To hold in play, to keep occupied or employed. I, with two more to help me, Will hold the foe in play. Macaulay.…

The theory that the various genera of bacteria are phases or variations of growth of a number of Protean species, each of which may exhibit, according to undetermined conditions, all or some of the forms characteristic of the different genera and species.

An instrument for determining and registering the variations in the size or volume of a limb, as the arm or leg, and hence the variations in the amount of blood in the limb. -- Pleth`ys*mo*graph"ic, a.

The study, by means of the plethysmograph, of the variations in size of a limb, and hence of its blood supply.

Hence, in a literary sense, additional; real; actual. Success goes invariably with a certain plus or positive power. Emerson. Plus sign (Math.), the sign (+) which denotes addition, or a positive quantity.

ious sect which first appeared at Plymouth, England, about 1830. They protest against sectarianism, and reject all official ministry or clergy. Also called Brethren, Christian Brethren, Plymouthists, etc. The Darbyites are a division of the Brethren.

A division of Radiolaria including numerous minute marine species. The skeleton is composed of silica, and is often very elegant in form and sculpture. Many have been found in the fossil state.

Same as Anthozoa. See Anthozoa, Madreporaria, Hydroid. [Written also polype.] Fresh-water polyp, the hydra. -- Polyp stem (Zoöl.), that portion of the stem of a siphonophore which bears the polypites, or feeding zooids.

oids, or polyps, of a coral, hydroid, or siphonophore; a hydranth. See Illust. of Campanularian.

ything but the natural phenomena or properties of knowable things, together with their invariable relations of coexistence and succession, as occurring in time and space. Such relations are denominated laws, which are to be discovered by observation, experiment, and comparison. This philosophy holds all inquiry into ca…

ny, A. D. 1724, settled his hereditary dominions on his eldest daughter, the Archduchess Maria Theresa.

A genus of umbelliferous plants, one species of which (P. pabularia), found in Thibet, Cashmere, Afghanistan, etc., has been used as fodder for cattle. It has decompound leaves with very long narrow divisions, and a highly fragrant smell resembling that of new clover hay.

Hasty; rash; quick; sudden; precipitate; as, precipitous attempts. Sir T. Browne. "Marian's low, precipitous `Hush!'" Mrs. Browning. -- Pre*cip"i*tous*ly, adv. -- Pre*cip"i*tous*ness, n.