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science fiction (n.)
1929 (first attested in advertisements for "Air Wonder Stories" magazine), though there is an isolated use from 1851; abbreviated form sci-fi is from 1955. Earlier in same sense was scientifiction (1916).
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Definitions of science fiction from WordNet
Dictionary entries near science fiction
Schwenkfeldian
sciamachy
sciatic
sciatica
science
science fiction
scienter
scientific
scientist
Scientology
scilicet