hypertufa

English

Etymology

From hyper- +‎ tufa.

Noun

hypertufa (uncountable)

1. An anthropic rock made from aggregates bonded with Portland cement, intended as a substitute for natural tufa.
   • 2007 June 7, Anne Raver, “Above Midtown, a Lilliputian Universe”, in New York Times‎^[1]:

     There are weight restrictions on rooftops and terraces, of course, and fiberglass is a lot lighter than tufa, the limestone rock used in alpine gardens, or the mix of cement, peat and sand that makes up hypertufa, the artificial stone used for troughs.