Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† ĕchĕnēis, ĭdis, f., = ἐχενηΐς, the sucking-fish, remora, Echeneis remora, Linn.; Plin. 9, 25, 41, § 79; 35, 1, 1, § 2 sq.; Luc. 6, 675; Ov. Hal. 99; Isid. 12, 6, 34.