Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Praecĭānus, a, um, adj.: vinum, a celebrated kind of wine, Plin. 14, 6, 8, § 60 (Praetetianus, Jahn): Praecianum pirum, Macr. S. 2, 15.