The Collaborative International Dictionary of English v.0.48:

Circulatory \Cir"cu*la*to*ry\, a. [L. circulatorius pert. to a
   mountebank: cf. F. circulatoire.]
   [1913 Webster]
   1. Circular; as, a circulatory letter. --Johnson.
      [1913 Webster]

   2. Circulating, or going round. --T. Warton.
      [1913 Webster]

   3. (Anat.) Subserving the purposes of circulation; as,
      circulatory organs; of or pertaining to the organs of
      circulation; as, circulatory diseases.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Circulatory \Cir"cu*la*to*ry\, n.
   A chemical vessel consisting of two portions unequally
   exposed to the heat of the fire, and with connecting pipes or
   passages, through which the fluid rises from the overheated
   portion, and descends from the relatively colder, maintaining
   a circulation.
   [1913 Webster]

WordNet (r) 3.0 (2006):

circulatory
    adj 1: of or relating to circulation [syn: circulative,
           circulatory]
    2: relating to circulatory system or to circulation of the blood