The Collaborative International Dictionary
Killow
Killow \Kil"low\, n. [Prov. E. kollow the smut or grime on the
backs of chimneys.]
An earth of a blackish or deep blue color.
--Woodward.
Wiktionary
killow
Etymology 1 n. An old unit of measure for grain, used in Constantinople. Etymology 2
n. An earth of a blackish or deep blue colour.