|a chattering or flighty, light-headed person.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
infantile in·fan·tile (ĭn'fən-tīl', -tĭl)
Of or relating to infants or infancy.
Displaying or suggesting a lack of maturity; extremely childish.