|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.|
acentric a·cen·tric (ā-sěn'trĭk)
Having no center.
Not located in the center.
Of or relating to a chromosome fragment lacking a centromere.