Lewis & Short

cērŭla, ae, f. dim. [cera],

  1. I. a small piece of wax: miniata, a kind of crayon, Cic. Att. 15. 14, 4 (with which the Romans were accustomed to strike out exceptionable passages in books): miniatula, the same, id. ib. 16, 11, 1 (al. miniata).
  2. II. Transf., = ceriolarium, a candlestick or stand for wax tapers: ARGENTEAE, Inscr. Orell. 2032.