caprolactam

noun

cap·​ro·​lac·​tam ˌka-prō-ˈlak-ˌtam 

: a white crystalline cyclic amide C₆H₁₁NO used especially in making one type of nylon

Word History

Etymology

caproic acid + lactone + amide

First Known Use

1944, in the meaning defined above

Rhymes for caprolactam

• lactam