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Of or pertaining to compounds formed by the condensation of two or more molecules of silicic acid. Polysilicic acid (Chem.), any one of a series of acids formed by the condensation of two or more molecules of silicic acid, with elimination of water.

A sulphide having more than one atom of sulphur in the molecule; -- contrasted with monosulphide.

A minute opening or passageway; an interstice between the constituent particles or molecules of a body; as, the pores of stones.

mp itch, winter itch. -- Prairie marmot. (Zoöl.) Same as Prairie dog, above. -- Prairie mole (Zoöl.), a large American mole (Scalops argentatus), native of the Western prairies. -- Prairie pigeon, plover, or snipe (Zoöl.), the upland plover. See Plover, n., 2. -- Prairie rattlesnake (Zoöl.), the massasauga. -- Pra…

mbic. Prismatic borax (Chem.), borax crystallized in the form of oblique prisms, with ten molecules of water; -- distinguished from octahedral borax. -- Prismatic colors (Opt.), the seven colors into which light is resolved when passed through a prism; primary colors. See Primary colors, under Color. -- Prismatic com…

A writing that protects or secures from molestation or arrest; a pass; a safe-conduct; a passport. He . . . gave them protections under his hand. Macaulay.

rmed with the lowest proportion of silicic acid, or having but one atom of silicon in the molecule.

hich has the lowest proportion of sulphur; a sulphide with but one atom of sulphur in the molecule.

Microscopic organic particles, molecular granules, powdered inorganic substances, etc., which in form, size, and grouping resemble bacteria.

Nearsighted, or dim-sighted; seeing obscurely; as, a purblind eye; a purblind mole. The saints have not so sharp eyes to see down from heaven; they be purblindand sand-blind. Latimer. O purblind race of miserable men. Tennyson. -- Pur"blind`ly, adv. -- Pur"blind`ness, n.

Butane, each molecule of which has four carbon atoms.

id, and obtained as a colorless liquid; -- so called from having four carbon atoms in the molecule. Called also isocrotonic acid.

A mole, bank, or wharf, formed toward the sea, or at the side of a harbor, river, or other navigable water, for convenience in loading and unloading vessels. [Written also key.]

To bury again. Ashmole.

odies, are made to recede from each other, or to resist each other's nearer approach; as, molecular repulsion; electrical repulsion.

That which remains of a molecule after the removal of a portion of its constituents; hence, an atom or group regarded as a portion of a molecule; -- used as nearly equivalent to radical, but in a more general sense.

A bank or mole to defend against the sea.

Disposed or arranged by an action originating in one's self or in itself. These molecular blocks of salt are self-posited. Tyndall.

The act of disposing or arranging one's self or itself. The self-positing of the molecules. R. Watts.

Made up of parts, as molecules or atoms, which mutually repel each other; as, gases are self-repelling.