hypertufa
nounEtymology From hyper- + tufa.
1
An anthropic rock made from aggregates bonded with Portland cement, intended as a substitute for natural tufa.
- 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.2007 June 7, Anne Raver, “Above Midtown, a Lilliputian Universe”, in New York Times: