The Collaborative International Dictionary of English v.0.48:

Anhelation \An`he*la"tion\, n. [L. anhelatio, fr. anhelare to
   pant; an (perh. akin to E. on) + halare to breathe: cf. F.
   anh['e]lation.]
   Short and rapid breathing; a panting; asthma. --Glanvill.
   [1913 Webster]