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From the Latin -?ceae, the feminine plural of -?ceus ("resembling").


-aceae f pl

  1. (taxonomy) Used to form the name of taxonomic families of plants, algae, bacteria, and fungi

Usage notes

  • In English, family names ending in -aceae are usually treated as plural (e.g., "Cunoniaceae are" or "the Cunoniaceae family is").
  • In English, most family names ending in -aceae follow the pronunciation patterns of /'e?si, -si?a?, -si?e?, -si?i/) (e.g., Solanaceae, /?so?l?'ne?si/).
  • There are only eight exceptions to the rule of using the -aceae termination for taxonomic families under the International Code of Nomenclature for algae, fungi, and plants (Melbourne Code, 2011). Each also has an accepted alternative (nomen alternativum), given in brackets:

Derived terms

See also

  • -idae (the equivalent for animals)





  1. nominative feminine plural of -?ceus
  2. genitive feminine singular of -?ceus
  3. dative feminine singular of -?ceus
  4. vocative feminine plural of -?ceus


  • Translingual: -aceae

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