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Abbreviation of amicus curiae.


  • IPA(key): /ˈæm.ɪ.kəs/, /ə.ˈmi.kəs/


amicus (plural amici)

  1. (law, informal) Someone not a party to a case who submits a brief and/or presents oral argument in that case.





From the root of amō (I love), perhaps with Proto-Indo-European *-ih₁ (instrumental suffix) + *-kos, as also in pudīcus, mendīcus.



amīcus (feminine amīca, neuter amīcum, comparative amīcior, superlative amīcissimus, adverb amīcē); first/second-declension adjective

  1. friendly, well-disposed, amicable
  2. loyal, devoted to
  3. supporting, propitious, helpful
  4. welcome, dear


First/second-declension adjective.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
Nominative amīcus amīca amīcum amīcī amīcae amīca
Genitive amīcī amīcae amīcī amīcōrum amīcārum amīcōrum
Dative amīcō amīcō amīcīs
Accusative amīcum amīcam amīcum amīcōs amīcās amīca
Ablative amīcō amīcā amīcō amīcīs
Vocative amīce amīca amīcum amīcī amīcae amīca


amīcus m (genitive amīcī, feminine amīca); second declension

  1. male friend
    Synonyms: necessārius, comes, sodālis, concordia
    amīcum parāreto make a friend; to befriend
  2. (Augustan and later) courtier, minister, counsellor


Second-declension noun.

Case Singular Plural
Nominative amīcus amīcī
Genitive amīcī amīcōrum
Dative amīcō amīcīs
Accusative amīcum amīcōs
Ablative amīcō amīcīs
Vocative amīce amīcī

Derived terms[edit]



  • amīcus” on page 130 of the Oxford Latin Dictionary (2nd ed., 2012)
  • De Vaan, Michiel (2008), “amō”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN

Further reading[edit]

  • amicus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • amicus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • amicus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • amicus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
  • Carl Meißner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • he received from the senate the title of friend: a senatu amicus appellatus est (B. G. 1. 3)
    • (ambiguous) to be friendly with any one: uti aliquo amico