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spurring
Spurry
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spurting
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sputum
sputum smear
Spuyten Duyvil Creek
SPW
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spy satellite

sputnik definitions

WordNet (r) 3.0 (2005)

n
1: a Russian artificial satellite; "Sputnik was the first man- made satellite to orbit the earth"

Merriam Webster's

noun Etymology: Russian, literally, traveling companion, from s, so with + put' path Date: 1957 any of a series of earth-orbiting satellites launched by the Soviet Union beginning in 1957

Britannica Concise

Any of a series of artificial earth satellites whose launching by the Soviet Union inaugurated the Space Age. Sputnik 1, the first satellite launched by humans (Oct. 1957), remained in orbit until early 1958, when it fell back and burned in earth's atmosphere. Sputnik 2 carried a dog, Laika, the first living creature to orbit earth; since Sputnik 2 was not designed to sustain life, Laika did not survive the flight. Eight more missions with similar satellites carried out experiments on various animals to test life-support systems and reentry procedures and to furnish data on space temperatures, pressures, particles, radiation, and magnetic fields.

Oxford Reference Dictionary

n. each of a series of Russian artificial satellites launched from 1957. Etymology: Russ., = fellow-traveller



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