It's Friday! The word of the day is
- Prism -
pronounced [priz-uh'm]
pronounced [priz-uh'm]
noun
2. Geometry. a solid having bases or ends that are parallel, congruent polygons and sides that are parallelograms.
3. Crystallography. a form having faces parallel to the vertical axis and intersecting the horizontal axes.
Origin
1. Optics. a transparent solid body, often having triangular bases, used for dispersing light into a spectrum or for reflecting rays of light.
2. Geometry. a solid having bases or ends that are parallel, congruent polygons and sides that are parallelograms.
3. Crystallography. a form having faces parallel to the vertical axis and intersecting the horizontal axes.
Origin
1570, a type of solid figure, from L.L. prisma (Martianus Capella), from Gk. prisma (Euclid), lit. "something sawed," from prizein "to saw." Meaning in optics is first attested 1612.
Related Words
opitcal prism
http://dictionary.reference.com/browse/prism
Related Words
opitcal prism
http://dictionary.reference.com/browse/prism
