episcotister

noun

ep·​i·​sco·​tis·​ter

ˌepəskōˈtistə(r)

plural -s

: a device for reducing the intensity of light in known ratio by means of rapidly rotating opaque and transparent sectors

Word History

Etymology

from (assumed) Greek episkotistos (verbal of Greek episkotizein to shadow, darken, from epi- + skotizein to darken, from skotos dark + -izein -ize) + English -er

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