1. [adj]  relating to circulatory system or to circulation of the blood
2. [adj]  of or relating to circulation

CIRCULATORY is a 11 letter word that starts with C.

1. \Cir"cu*la*to*ry\, a. [L. circulatorius pert. to a
   mountebank: cf. F. circulatoire.]
   1. Circular; as, a circulatory letter. --Johnson.
   
   2. Circulating, or going round. --T. Warton.
   
   3. (Anat.) Subserving the purposes of circulation; as,
      circulatory organs; of or pertaining to the organs of
      circulation; as, circulatory diseases.
   
   

2. \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.