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Pappus

Pappus (păp´əs), fl. c.300, Greek mathematician of Alexandria. He recorded and enlarged on the results of his predecessors, including Euclid and Apollonius of Perga, in his Mathematical Collection (8 books; date conjectural). The six and a half extant books, edited and translated into Latin by Commandinus (1588), stimulated a revival of geometry in the 17th cent.; Descartes expounded several of his problems. The collection was reedited by Frederick Hultsch (1876–78). Pappus' other works include a commentary on Ptolemy's Almagest.

See T. L. Heath, A Manual of Greek Mathematics (1931).

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pappus

pappus A group of modified sepals, often in the form of a ring of silky hairs. For example, when the fruit of the dandelion matures a pappus of hairs persists at the top of a thin stalk forming a parachute-like structure, which serves to disperse the fruit.

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pappus

pappus (bot.) downy appendage on fruits. XVIII. — Gr. páppos (i) grandfather, (ii) down on plants.
So pappose (-OSE1) XVII.

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pappus

pappus A tuft of hairs or bristles, derived from the calyx, that terminates the fruit of many Compositae and Valerianaceae.

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