Home › Words › M › mooncretemooncretemooncrete means synonym of lunarcrete (“a hypothetical concrete-like material, made from lunar matter, that could be used to build a colony on the Moon”).EtymologyBlend of moon + concrete, equivalent to moon + -crete.nounSynonym of lunarcrete (“a hypothetical concrete-like material, made from lunar matter, that could be used to build a colony on the Moon”).e.g.“He gestured at the mooncrete. "Great stuff, huh? And another case of the Builders showing off. They not only make us a moon; they make us one that will remain forever new."” — 1988, David F Nighbert, Timelapse, Headline, →ISBN, page 159:Definitions & examples from Wiktionary (CC BY-SA 3.0).