Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† branchĭae, ārum (sing. branchia, ae, Aus. Mos. 266; Vulg. Tob. 6, 4), f., = τὰ βράγχια, the gills of fish, Col. 8, 17, 12; Plin. 9, 7, 6, § 16; 9, 18, 33, § 69.