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Having flat petals.

Plane or flat on one side, and concave on the other; as, a plano-concave lens. See Lens.

Plane or flat on one side, and conical on the other. Grew.

Plane or flat on one side, and convex on the other; as, a plano-convex lens. See Convex, and Lens.

Plane or flat on one side, and spherical on the other.

The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.

Any flat, thin piece of metal, clay, ivory, or the like, used for ornament, or for painting pictures upon, as a slab, plate, dish, or the like, hung upon a wall; also, a smaller decoration worn on the person, as a brooch.

or plot of ground laid out with some design, or for a special use; usually, a portion of flat, even ground. This flowery plat, the sweet recess of Eve. Milton. I keep smooth plat of fruitful ground. Tennyson.

A flat molding, or group of moldings, the width of which much exceeds its projection, as the face of an architrave.

A flat, or nearly flat, piece of metal, the thickness of which is small in comparison with the other dimensions; a thick sheet of metal; as, a steel plate.

Having flat, or leaflike, gills, as the bivalve mollusks.

A flat surface; especially, a broad, level, elevated area of land; a table-land.

Any flat or horizontal surface; especially, one that is raised above some particular level, as a framework of timber or boards horizontally joined so as to form a roof, or a raised floor, or portion of a floor; a landing; a dais; a stage, for speakers, performers, or workmen; a standing place.

The quality or state of being flat, thin, or insipid; flat commonness; triteness; staleness of ideas of language. To hammer one golden grain of wit into a sheet of infinite platitude. Motley.

Flatly. See Plat, a. [Obs.]

Flatness. [Obs.] Palsgrave.

To flatten and make into sheets or plates; as, to platten cylinder glass.

Having a broad, flat face.

A combining form from Gr. platy`s broad, wide, flat; as, platypus, platycephalous.

Lateral flattening of the tibia.