the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)
- krackning [ kemi ]
break partially but keep its integrity
- "The glass cracked"
hit forcefully; deal a hard blow, making a cracking noise:
- ""The teacher cracked him across the face with a ruler""
cause to become cracked
- "heat and light cracked the back of the leather chair"
become fractured; break or crack on the surface only
- "The glass cracked when it was heated"
making a loud sharp sound as of a rifle shot or a breaking branch or a whip
- "lion tamers with their cracking whips"