nCaligo(Med) Dimness or obscurity of sight, dependent upon a speck on the cornea; also, the speck itself.
Century Dictionary and Cyclopedia
ncaligoDimness of sight; caligation. Also called achlys.
ncaligo[capitalized] [NL.] A genus of butterflies, of the subfamily Brassolinæ. C. eurylochus is the enormous owl-butterfly of South America, sometimes expanding 9 inches. C. uranus is another species with an orange bar across the wings.