Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
mĕrīdĭo, 1, v. n., and mĕrīdĭor, 1, v. dep. [meridies], to take a mid-day nap or siesta: jube, ad te veniam meridiatum, Cat. 32, 3: meridiari ante cibum, Cels. 1, 2: dum ea meridiaret, Suet. Calig. 38: inter acervos eorum meridiati sunt, i. e. have taken their ease, Vulg. Job, 24, 11.