— spectroscopic /spek'treuh skop"ik/ , spectroscopical , adj. — spectroscopically , adv.
/spek"treuh skohp'/ , n. Optics.
an optical device for producing and observing a spectrum of light or radiation from any source, consisting essentially of a slit through which the radiation passes, a collimating lens, and an Amici prism.
[ 1860-65; SPECTRO- + -SCOPE ]