Artificial intelligent assistant

lacmus

lacmus
  (ˈlækməs)
  [ad. Du. lakmoes, f. lak lac n.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.

Oxford English Dictionary

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