The Collaborative International Dictionary
Pseudonavicula
Pseudonavicula \Pseu`do*na*vic"u*la\, n.; pl. Pseudonavicul[ae]. [NL., fr. Gr. pseydh`s false + NL. navicula, a genus of diatoms. See Navicular.] (Zo["o]l.) One of the minute spindle-shaped embryos of Gregarin[ae] and some other Protozoa.
Wiktionary
pseudonavicula
n. (context zoology English) One of the minute spindle-shaped embryos of Gregarinae and some other Protozoa.