a. Obs. rare1. [f. L. quotann-is every year + -AL.] Yearly, annual.
 
1651.  Biggs, New Disp., 170. A quotannal recidivation.
 
  So Quotannual a. (after annual). Obs.
 
1658.  J. Robinson, Eudoxa, x. 55. There would be a fear of 
 a quotannuall Phaetontick combustion.