Ex*tem`po*ra"ne*ous (?), a. [See Extempore.]
Composed, performed, or uttered on the spur of the moment, or without previous study; unpremeditated; off-hand; extempore; extemporary; as, an extemporaneous address or production.
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Ex*tem`po*ra"ne*ous*ly, adv. --
Ex*tem`po*ra"ne*ous*ness,n.
© Webster 1913.