Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† mōrum, i, n., = μῶρον and μόρον, a mulberry; a blackberry: nigra mora, Hor. S. 2, 4, 22; cf. Plin. 15, 24, 27, § 96: in duris haerentia mora rubetis, Ov. M. 1, 105; cf. Plin. 24, 13, 73, § 117.