Lewis & Short

pŭellāris, e, adj. [puella], of or belonging to a girl or young woman, girlish, maidenly, youthful: animi, of the youthful companions of Proserpine, Ov. F. 4, 433: plantae, of Europa when carried off, id. ib. 5, 611: anni, Tac. A. 14, 2: aetas, Quint. 6, prooem. § 5; cf. Vulg. Num. 30, 4: suavitas, Plin. Ep. 5, 16, 2: augurium, which young wives institute respecting their accouchement, Plin. 10, 55, 76, § 154.
Hence, adv.: pŭellārĭter, in a girlish manner, girlishly: puellariter aliquid nescire, Plin. Ep. 8, 10, 1: rapere comas, Mart. Cap. 1, § 88.