prismoidal (prizmoidal)

[ prismoid.-2. In entom., noting long bodies when they have more than four faces: as, pris moidal joints of the antennæ. Kirby. - Prismoidal formula, a formula based on the consideration of a solid as composed of prismoids. prism-train (prizm'trān), n. A series of prisms used with the spectroscope to give increased dispersion. See spectroscope. Instruments (spectroscopes) in which the prism - train is replaced by a diffraction-grating are still more powerful. C. A. Young , The Sun, p. 191. [ prism +-y1.] Pertain prismy (priz'mi), a . ing to or like a prism; prismatic in color. The mighty ministers Unfurled their prismy wings. Shelley , Demon of the World. The prismy hues in thin spray showers. Whittier, Tent on the Beach.