Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† hyăcinthĭnus, a, um, adj., = ὑακίνθινος, of or belonging to the hyacinth, hyacinthine: flos, the hyacinth, Cat. 61, 93: laena, i. e. hyacinth-colored, Pers. 1, 32.