pyrrolidone
noun
pyr·rol·idone
-dōn
plural -s
: a crystalline or liquid lactam C4H7NO made by a series of steps using acetylene, formaldehyde, and ammonia and used chiefly in making polyvinylpyrrolidone; 2-pyrrolidin-one
called also 2-pyrrolidone
Word History
Etymology
International Scientific Vocabulary pyrrolidine + -one