Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† ăcŏnītum, i, n., = ἀκόνιτον, a poisonous plant, wolf’s-bane, monk’s-hood, aconite, Plin. 27, 2, 2; 6, 1, 1 fin.: aconiton, Ov. M. 7, 407.
In plur., Verg. G. 2, 152; Ov. M. 7, 419; Aus. Idyll. 12, 9, 11; Luc. 4, 322.
For a strong poison in gen., Ov. M. 1, 147; Juv. 10, 25.