The Collaborative International Dictionary of English v.0.48:

Ceruse \Ce"ruse\, n. [F. c['e]ruse, L. cerussa.]
   1. White lead, used as a pigment. See White lead, under
      White.
      [1913 Webster]

   2. A cosmetic containing white lead.
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            To distinguish ceruse from natural bloom.
                                                  --Macaulay.
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   3. (Min.) The native carbonate of lead.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ceruse
    n 1: a poisonous white pigment that contains lead [syn: white
         lead, ceruse, lead carbonate]