Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. palmĭpes, pĕdis, adj. [1. palma-pes], broad-footed: volucres aut palmipedum in genere sunt, uti anseres, etc., Plin. 10, 11, 13, § 29; 11, 47, 107, § 256.
2. palmĭpes, pĕdis, adj. [palmus-pes], a foot and a palm high: palmipedi intervallo, Plin. 17, 20, 32, § 143: gradus spectaculorum ne minus alti sint palmipede (al. palmopede), Vitr. 5, 6 fin.