Definify.com

Webster 1828 Edition

Adj.

[L. extemporalis; ex and tempus, time.] Made or uttered at the moment, without premeditation; as an extemporal discourse.

Speaking without premeditation.

Instead of this word, extemporaneous and extemporary are now used.

extemporal ‎(comparative more extemporal, superlative most extemporal)