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extemporaneous (adj.)
"made, done, procured, or furnished 'at the time,'" hence "unpremeditated," 1650s, from Medieval Latin extemporaneus, from Latin ex tempore (see extempore). Earlier was extemporal (1560s); extemporanean (1620s). Related: Extemporaneously; extemporaneousness.
updated on September 28, 2014
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Definitions of extemporaneous from WordNet
Dictionary entries near extemporaneous
exsanguinate
exsert
exsiccate
exsiccation
extant
extemporaneous
extemporary
extempore
extemporize
extend
extended