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Pappus

Definition:

(noun) A collective term for a tuft of hairs, scales, or bristles that are attached to the base of certain plant seeds and aids in their dispersal.

(noun) In mathematics, specifically in geometry, pappus refers to a theorem named after the ancient Greek mathematician Pappus of Alexandria, which relates the centers of gravity of various related sets of points.

Examples:

Noun: The dandelion seed has a pappus that causes it to float away on the wind.

Noun: According to the pappus theorem, the centroid of a triangle is the intersection of its medians.

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