The Collaborative International Dictionary of English v.0.48:

Circumflect \Cir"cum*flect\, v. t. [imp. & p. p.
   Circumflected; p. pr. & vb. n. Circumflecting.] [L.
   circumflectere. See Circumflex.]
   1. To bend around.
      [1913 Webster]

   2. To mark with the circumflex accent, as a vowel. [R.]
      [1913 Webster]