The Collaborative International Dictionary
Caligation
Caligation \Cal`i*ga"tion\ (-g[=a]"sh[u^]n), n. [L. caligatio,
fr. caligare to emit vapor, to be dark, from caligo mist,
darkness.]
Dimness; cloudiness. [R.]
--Sir T. Browne.
Wiktionary
caligation
n. (context obsolete nonce English) dimness; cloudiness