Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. agna, ae (abl. plur. agnabus, Hier. Retr. 2, 55, 1), f. [agnus], a ewe lamb, Varr. R. R. 2, 2, 2; Vulg. Gen. 21, 28: humilis, Hor. C. 2, 17, 32: pulla, id. S. 1, 8, 27: muta, id. ib. 2, 3, 19: nitida, id. ib. 2, 3, 214: novella, Ov. P. 1, 118: pavens, id. M. 6, 527: tenera, Stat. Th. 8, 576.
‡ 2. agna, ae, f., a blade, a straw, Fest. s. v. pennatus, p. 211 Müull. [kindr. with 2. acus, q. v.; cf. Aufrecht in Zeitschr. für vergl. Sprachf. 1, p. 354].