Extempore
Extempore , adverb
[Latin ex out + tempus, temporis, time. See Temporal.]
Without previous study or meditation; without preparation; on the spur of the moment; suddenly; extemporaneously; as, to write or speak extempore.
Done or performed extempore.
Speaking or writing done extempore. [Obsolete] — Dryden
Extempore dissertation.
Extempore poetry.