|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
insecticide in·sec·ti·cide (ĭn-sěk'tĭ-sīd')
A chemical substance that kills insects.