Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
bĭpalmis, e (access. form bĭpalmus, a, um, App. Herb. 7), adj. [bis-palmus], two spans long or broad, of two spans (very rare): tabulae, Varr. R. R. 3, 7, 4: spiculum, Liv. 42, 65, 9.