Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cŏrolla, ae, f. dim. [corona], a little crown or garland (mostly poet.), Plaut. Bacch. 1, 1, 37; Cat. 63, 66; Prop. 1, 16, 7; Plin. 8, 5, 5, § 13; Paul. ex Fest. p. 63, 14 Müll.