| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
fistula fis·tu·la (fĭs'chə-lə)
n. pl. fis·tu·las or fis·tu·lae (-lē')
An abnormal passage from a hollow organ to the body surface, or from one organ to another.