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Pyramidal :: Pyramidal (a.) Same as Tetragonal.

Pyramidia :: Pyramidia (pl. ) of Pyramidio.

Panicle :: Panicle (n.) A pyramidal form of inflorescence, in which the cluster is loosely branched below and gradually simpler toward the end..

Pyramidical :: Pyramidical (a.) Of or pertaining to a pyramid; having the form of a pyramid; pyramidal.

Diamond :: Diamond (n.) A pointed projection, like a four-sided pyramid, used for ornament in lines or groups..

Pyramid :: Pyramid (n.) A solid body standing on a triangular, square, or polygonal base, and terminating in a point at the top; especially, a structure or edifice of this shape..

Macroprism :: Macroprism (n.) A prism of an orthorhombic crystal between the macropinacoid and the unit prism; the corresponding pyramids are called macropyramids.

Pyramid :: Pyramid (n.) A solid figure contained by a plane rectilineal figure as base and several triangles which have a common vertex and whose bases are sides of the base.

Pyramoid :: Pyramoid (n.) See Pyramidoid.

Sphenoid :: Sphenoid (n.) A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid.

Berylloid :: Berylloid (n.) A solid consisting of a double twelve-sided pyramid; -- so called because the planes of this form occur on crystals of beryl.

Altitude :: Altitude (n.) The perpendicular distance from the base of a figure to the summit, or to the side parallel to the base; as, the altitude of a triangle, pyramid, parallelogram, frustum, etc..

Right :: Right (a.) Upright; erect from a base; having an upright axis; not oblique; as, right ascension; a right pyramid or cone..

Obelisk :: Obelisk (n.) An upright, four-sided pillar, gradually tapering as it rises, and terminating in a pyramid called pyramidion. It is ordinarily monolithic. Egyptian obelisks are commonly covered with hieroglyphic writing from top to bottom..

Zirconoid :: Zirconoid (n.) A double eight-sided pyramid, a form common with tetragonal crystals; -- so called because this form often occurs in crystals of zircon..

Homopolic :: Homopolic (a.) In promorphology, pertaining to or exhibiting that kind of organic form, in which the stereometric ground form is a pyramid, with similar poles. See Promorphology..

Bushhammer :: Bushhammer (n.) A hammer with a head formed of a bundle of square bars, with pyramidal points, arranged in rows, or a solid head with a face cut into a number of rows of such points; -- used for dressing stone..

Dihexagonal :: Dihexagonal (a.) Consisting of two hexagonal parts united; thus, a dihexagonal pyramid is composed of two hexagonal pyramids placed base to base..

Subtriple :: Subtrihedral (a.) Approaching the form of a three-sided pyramid; as, the subtrihedral crown of a tooth..

Date :: Date (v. t.) To note or fix the time of, as of an event; to give the date of; as, to date the building of the pyramids..

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