Source : Webster's Revised Unabridged Dictionary (1913)

Lac \Lac\, n. [Per. lak; akin to Skr. l[=a]ksh[=a]: cf. F.
   lague, It. & NL. lacca. Cf. {Lake} a color, {Lacquer},
   {Litmus}.]
   A resinous substance produced mainly on the banyan tree, but
   to some extent on other trees, by the {Coccus lacca}