V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Entry नीलकम्
नीलकम्nīlakam1 Black salt.
1 Black salt.
Blue steel.
Blue vitriol.
Derived forms and compounds
-कः
A dark-coloured horse.
(In Algebra) The third unknown quantity (corresponding to z of European Algebra).