Letters that make rock wool
o, k, l, c, r, w are letters that make 'rock wool'
o, k, l, c, r, w are letters that make 'rock wool'
1 possible definitions for 'rock wool'
Under this definition, rock wool is a noun and has the following properties:
mineral wool has the same meaning as rock wool
'rock wool' can be a type of insulator, dielectric, nonconductor.