Note: this piece was broadcast on NJN (New Jersey Public Radio), New Hampshire Public Radio and WMUB, an NPR station in Oxford, Ohio. It was also podcast on KXCI.org, in Tucson.
What does the word rock mean? Simple enough question. But how did the term originate? Where — and why? These questions are bit more difficult to answer!
Tune in for a quick romp through the origins of the word — with Berklee College of Music professor Ken Zambello.
Click here: 
to listen (3:30 minutes).
(And thanks to Pam Scrutton and Planning For Elders for the “Let’s Rock and Roll” illustration!)
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Lexiology dictionary of American English defines rock as:
(n) a lump or mass of hard consolidated mineral matter
(n) material consisting of the aggregate of minerals like those making up the Earth’s crust
https://www.lexiology.com/meaning/rock
what is rock. and differentiate rock from mineral. and types of rock and how did they originate. and mechanical/physical properties of rock and chemical properties of rock.