Caliginous

Ca‐lig″i‐nous (?), a. [L. caliginosus; cf. F. caligineux.] Affected with darkness or dimness; dark; obscure. Blount.

The caliginous regions of the air.

Hallywell.

— Ca‐lig″i‐nous‐ly, adv. — Ca‐lig″i‐nous‐ness, n.