Amici prism
noun
Ami·ci prism
əˈmēchē-
: a composite prism used in direct-vision spectroscopes and made by combining alternate flint and crown glass components with their refracting edges in opposite directions and with prism angles so chosen that nonhomogeneous light passing through the prism is dispersed into a spectrum, the beam as a whole undergoing no net deviation compare achromatic prism
Word History
Etymology
after Giovanni Battista Amici †1863 Italian astronomer
First Known Use
1855, in the meaning defined above