adjective ca·lig·i·nous \kə-ˈli-jə-nəs\

Definition of caliginous

  1. :  misty, dark <a caliginous atmosphere>

Origin and Etymology of caliginous

Medieval French or Latin; Medieval French caligineux, from Latin caliginosus, from caligin-, caligo darkness

First Known Use: circa 1550

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