[ad. Du. lakmoes, f. lak LAC sb.1 + moes pulp.] = LITMUS.
1794. Sullivan, View Nat., I. 258. The tincture of lacmus.
1812. J. Smyth, Pract. of Customs (1821), 150. Litmus, or Lacmus, in the Arts, is a blue pigment, formed from Archil.