Pseu`do·na·vic'u·la noun ; plural Pseudonaviculæ . [ New Latin , from Greek pseydh`s false + New Latin navicula , a genus of diatoms. See Navicular .] (Zoology) One of the minute spindle-shaped embryos of Gregarinæ and some other Protozoa. Found on http://www.encyclo.co.uk/webster/P/186