Etymology
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lucifugous (adj.)

"shunning light" (in reference to bats, cockroaches, etc.), 1650s, from Latin lucifugus "light-shunning," from stem of lucere "to shine" (from suffixed (iterative) form of PIE root *leuk- "light, brightness") + stem of fugax "apt to flee, timid," figuratively "transitory, fleeting," from fugere "to flee" (see fugitive (adj.)).

updated on April 29, 2017

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Definitions of lucifugous from WordNet

lucifugous (adj.)
light-avoiding;
Synonyms: lucifugal
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.