| 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. |
plasminogen plas·min·o·gen (plāz-mĭn'ə-jən)
n.
The inactive precursor to plasmin that is found in body fluids and blood plasma. Also called profibrinolysin.