lunarcrete
A hypothetical concrete-like material, made from lunar matter, that could be used to build a colony on the Moon.
uncountable
Researcher Larry Beyer of the University of Pittsburgh says a lunarcrete project would begin with the shipment of two molds and a work crew from Earth. First, the workers would bolt together an inner mold. It would be pressure tight and would serve as their temporary quarters. Then they'd erect an outer mold with a six-foot gap from the inner mold.
Where it comes from
Blend of lunar + concrete, equivalent to lunar + -crete.
Adapted from the Wiktionary entry lunarcrete (CC BY-SA 4.0).