PRISM n. 3 definitions
form the planes of which are parallel to the vertical axis. See Form, n., 13. Achromatic prism (Opt.), a prism composed usually of two prisms of different transparent substances which have unequal dispersive powers, as two different kinds of glass, especially flint glass and crown glass, the difference of dispersive p…
PRISON n. 4 definitions
nfined, or restrained of personal liberty; hence, a place or state o Bring my soul out of prison, that I may praise thy name. Ps. cxlii. 7. The tyrant Æolus, . . . With power imperial, curbs the struggling winds, And sounding tempests in dark prisons binds. Dryden.