Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† cătăplasma, ătis, n., Veg. 2, 14 (abl. cataplasmatibus, Veg. 3, 25; access. form cătăplasmus; only abl. sing. cataplasmo, Lucil. ap. Non. p. 311, 25, and dat. and abl. plur. cataplasmis, Cels. 7, 26, 5; 4, 4, 3; 4, 7, 2; Veg. 2, 3 b; 5, 2, 2; cf. Schneid. Gr. p. 267), = κατάπλασμα; in medicine, a poultice, plaster, cataplasm, Cels. 3, 19, and l. l.; Plin. 20, 17, 73, § 191; 36, 17, 28, § 133; Veg. 2, 14, 2.
cătăplasmo, āre, v. a. [cataplasma], to apply a poultice to: praecordia, Cael. Aur. Acut. 2, 19, 120; cf. id. Tard. 5, 1: equum, Veg. 5, 2, 2; Macer. Flor. 18, v. 723.