|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|atavistic (āt'ə-vĭs'tĭk) Pronunciation Key
Relating to an inherited trait that reappears in an individual after being absent from a strain of organism for several generations. Atavistic traits were formerly thought to be throwbacks to ancestral types but are now known to be due to the inheritance of a pair of recessive genes.