Lewis & Short

labdăcismus, i, m., = λαβδακισμός, labdacism, a fault in speaking.

  1. I. The too frequent use of the letter l (as, sol et luna luce lucebant alba, levi, lactea), Mart. Cap. 5, § 514.
  2. II. An erroneous pronunciation of the letter l, like the Spanish ll, Diom. 448 P.; Isid. Orig. 1, 31, 8.