Pi·card (p -kär ), Jean 1620-1682. French cleric and astronomer who made an accurate measurement of a degree of meridian and subsequently calculated the circumference of the earth (1668-1670). |
Picard (French) [pikar]
n
(Biographies / Picard, Jean (1620-1682) M, French, SCIENCE: astronomer) Jean (ʒɑ̃). 1620-82, French astronomer. He was the first to make a precise measurement of a longitude line, enabling him to estimate the earth's radius
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