auxiliary


From The Collaborative International Dictionary of English v.0.48:

Auxiliary \Aux*il"ia*ry\ (?; 106), a. [L. auxiliarius, fr.
   auxilium help, aid, fr. augere to increase.]
   Conferring aid or help; helping; aiding; assisting;
   subsidiary; as auxiliary troops.
   [1913 Webster]

   Auxiliary scales (Mus.), the scales of relative or
      attendant keys. See under Attendant, a.

   Auxiliary verbs (Gram.). See Auxiliary, n., 3.
      [1913 Webster]
.

From The Collaborative International Dictionary of English v.0.48:

Auxiliary \Aux*il"ia*ry\, n.; pl. Auxiliaries.
   1. A helper; an assistant; a confederate in some action or
      enterprise.
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   2. (Mil.) pl. Foreign troops in the service of a nation at
      war; (rarely in sing.), a member of the allied or
      subsidiary force.
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   3. (Gram.) A verb which helps to form the voices, modes, and
      tenses of other verbs; -- called, also, an {auxiliary
      verb}; as, have, be, may, can, do, must, shall, and will,
      in English; [^e]tre and avoir, in French; avere and
      essere, in Italian; estar and haber, in Spanish.
      [1913 Webster]

   4. (Math.) A quantity introduced for the purpose of
      simplifying or facilitating some operation, as in
      equations or trigonometrical formul[ae]. --Math. Dict.
      [1913 Webster]
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