caput mortuum

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English

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Etymology

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Unadapted borrowing from Latin caput mortuum (literally dead head).

Pronunciation

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  • IPA(key): /ˈkæpət ˈmɔː(ɹ)tjʊəm/

Noun

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caput mortuum (uncountable)

  1. (alchemy) Worthless residue of sublimation or distillation.
  2. Cardinal purple, a variety of haematite iron oxide pigment.
    • 2018, Kate Atkinson, Transcription, page 227:
      Were they working their way through the colours and now had reached the more abstruse layers of the spectrum? What would be next — caput mortuum, heliotrope? The colours of the day.

See also

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Latin

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English Wikipedia has an article on:
Wikipedia

Etymology

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Literally, dead head. Figurative use from alchemical literature.

Noun

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caput mortuum n (genitive capitis mortuum); third declension

  1. a dead man's head, a skull
  2. worthless residue, useless substance
    • 1591 "Caput mortuum, ut est apud Paracelsum, sign. materias, quae sunt in fundo vasis chimici" (Antonio Ricciardo, Commentaria symbolica, p. 138)
  3. Cardinal purple, a variety of haematite iron oxide pigment

Declension

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Third-declension noun (neuter, imparisyllabic non-i-stem) with an indeclinable portion.

Case Singular Plural
Nominative caput mortuum capita mortuum
Genitive capitis mortuum capitum mortuum
Dative capitī mortuum capitibus mortuum
Accusative caput mortuum capita mortuum
Ablative capite mortuum capitibus mortuum
Vocative caput mortuum capita mortuum

Swedish

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Etymology

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Unadapted borrowing from Latin caput mortuum.

Noun

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caput mortuum c

  1. (alchemy) caput mortuum; residue
    Synonyms: 🝎, nigredo
    • 1771 June 15, “Lärda saker och rön. [Learned things and findings]”, in Stockholms vecko-blad[1], page 1:
      Caput mortuum ger och efter afbränningen något fast lut-salt.
      Caput mortuum gives and after burning some solid lye-salt.
  2. a brown-purple pigment, mainly of iron oxide (color/colour)
    Synonym: (dated) engelskt rött
  3. mummy brown; a reddish-brown pigment, made from ground mummy and resin (color/colour)
    Synonyms: egyptiskt brun, mumia, mumiebrunt