a resinous substance deposited on the twigs of various trees in southern Asia by the female of the lac insect: used in the manufacture of varnishes, sealing wax, etc., and in the production of a red coloring matter. Compare shellac (defs 1, 2).
the sum of 100,000, especially of rupees. The usual punctuation for sums of Indian money above a lac is with a comma after the number of lacs: Rs. 30,52,000 (i.e., 30 lacs and 52,000) instead of 3,052,000.