|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.|
|pathol the abnormal development of a fertilized egg outside the cavity of the uterus, usually within a Fallopian tube|
ectopic pregnancy n.
Implantation and subsequent development of a fertilized ovum outside the cavity of the uterus. Also called eccyesis.