caput mortuum

noun caput mor·tu·um \-ˈmȯrchəwəm\

Definition of caput mortuum

plural

capita mortua

\-wə\
  1. 1 alchemy :  the residuum after distillation or sublimation

  2. 2 :  dross :  worthless residue

  3. 3 or caput mortuum vitrioli \-ˌvi‧trēˈōˌlē, -ī\ :  a red iron-oxide pigment made by calcining iron sulfate

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Origin and Etymology of caput mortuum

New Latin, literally, dead head


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