1. Resembling, or pertaining to, a prism; as, a prismatic form or cleavage.

2. Separated or distributed by a prism; formed by a prism; as, prismatic colours.

3. <chemistry> Same as Orthorhombic.

<chemistry> Prismatic borax, borax crystallized in the form of oblique prisms, with ten molecules of water; distinguished from octahedral borax.

<optics> Prismatic colours, the spectrum produced by the passage of light through a prism.

Origin: Cf. F. Prismatique.

(01 Mar 1998)

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