|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.|
serration ser·ra·tion (sə-rā'shən, sě-)
The state of being serrate.
A series or set of teeth or notches.
A single tooth or notch in a serrate edge.