- improper fraction,
- improper integral,
Origin of impromptu
Examples from the Web for impromptus
He astonished people at dinner by the impromptus he prepared at breakfast; in a word, he was a wit.Paul Clifford, Complete|Edward Bulwer-Lytton
For completeness and height, and for sudden surprise, this speech exceeds all impromptus on record.The Brothers' War|John Calvin Reed
How often have I hover'd at the edge of a crowd of them, to hear their repartees and impromptus!Complete Prose Works|Walt Whitman
There are four Impromptus and four Ballades, also four Scherzos.The World's Great Men of Music|Harriette Brower
Another remarkable question which I feel a wish to touch upon before closing this communication, is that of impromptus.
Word Origin for impromptu
1660s (adv.), 1764 (adj.), from French impromptu (1650s), from Latin in promptu "in readiness," from assimilated form of in- "into, in, on, upon" (see in- (2)) + promptu, ablative of promptus "readiness," from past participle of promere "to bring out," from pro- "before, forward, for" + emere "to obtain" (see exempt).