Passérculus, huius passérculi, pen. cor. dim. Cic.A little sparow.
Lewis and Short: Latin dictionary
passercŭlus, i, m.dim. [id.], a little sparrow, sparrowlet, Cic. Div. 2, 30, 65.—As a term of endearment: dic me igitur tuum passerculum, Plaut. As. 3, 3, 76.