melanoscopen.
/ˈmɛlənə(ʊ)skəʊp/, U.S. /ˈmɛlənoʊˌskoʊp/, /ˈmɛlənəˌskoʊp/ Now historical.
An instrument consisting of a combination of coloured glasses formerly used to exhibit certain optical properties of chlorophyll, and causing the green colour of plants to appear almost black.
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the world > physical sensation > sight and vision > optical instruments > instruments for observing > [noun] > light or radiation
iriscope1841
spectroscope1861
photoscope1872
melanoscope1876
schistoscope1876
radioscope1896
spinthariscope1903
scintilloscope1904
streak camera1962
1876 Catal. Special Coll. Sci. Apparatus S. Kensington Mus. (1877) 247 Melanoscope. Prof. Dr. Lommel, Erlangen.
a1884 E. H. Knight Pract. Dict. Mech. Suppl. 592/2 [with incorrect explanation, followed in later dicts.].
1924 Science 14 Mar. 242/1 With this filter foliage appears black, and so he [sc. Lommel] called his filter, when made up like a pair of dromoscopes (automobile goggles), a melanoscope.
This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022).
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n.1876