Dipleidoscope :: Dipleidoscope (n.) An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass disposed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is on the meridian..

Pleiad :: Pleiad (n.) One of the Pleiades.

Pleiades :: Pleiades (n. pl.) The seven daughters of Atlas and the nymph Pleione, fabled to have been made by Jupiter a constellation in the sky..

Pleiades :: Pleiades (n. pl.) A group of small stars in the neck of the constellation Taurus.

Plein :: Plein (a.) Plan.

Plein :: Plein (v. i. & t.) To complain. See Plain.

Plein :: Plein (a.) Full; complete.

Pleiocene :: Pleiocene (a.) See Pliocene.

Pleiophyllous :: Pleiophyllous (a.) Having several leaves; -- used especially when several leaves or leaflets appear where normally there should be only one.

Pleiosaurus :: Pleiosaurus (n.) Same as Pliosaurus.

Pleistocene :: Pleistocene (a.) Of or pertaining to the epoch, or the deposits, following the Tertiary, and immediately preceding man..

Pleistocene :: Pleistocene (n.) The Pleistocene epoch, or deposits..

Terreplein :: Terreplein (n.) The top, platform, or horizontal surface, of a rampart, on which the cannon are placed. See Illust. of Casemate..

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