Plagionite
Pla"gi*o*nite\, n. [Gr. ? oblique. So called in allusion to its usually oblique crystallization.] (Min.) A sulphide of lead and antimony, of a blackish lead-gray color and metallic luster.| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
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