Pozzolanic vs Pozzolan - What's the difference?

Pozzolan is a derived term of pozzolanic.

is having the characteristics of pozzolana, a type of volcanic ash used for mortar or for cement which sets under water.

any material which, when combined with calcium hydroxide, exhibits cementitious properties; often used as an extender with Portland cements.

(en adjective)

Having the characteristics of pozzolana, a type of volcanic ash used for mortar or for cement which sets under water.

*The Concise Oxford Dictionary , 10th ed, p.1122.

(en noun)

Any material which, when combined with calcium hydroxide, exhibits cementitious properties; often used as an extender with Portland cements.

*{{quote-news, year=2009, date=March 31, author=Henry Fountain, title=Concrete Is Remixed With Environment in Mind, work=New York Times citation

, passage=Both are what are called pozzolans , reactive materials that help make the concrete stronger. }}

*pozzolanic