any of a variety of extremely high-density substances
Gehenna of a big crop. Price'll drop like a brick of collapsium, and this time next year we'll be using brandy to wash our feet in.!
The metal looked like collapsium, the incredibly tough stuff used for atomic rocket-tube liners.
A collapsium-plated star-cruiser is a collapsium-plated star-cruiser in Poughkeepsie or in Peckham. Sf is, like rock music, a common frame of reference between the USA and the UK.
The crowbar-to-be was in a very delicate stage right now, its collapsium lattice supported by little more than good intentions.
They had only two uses: they could be squeezed into the tiny black holes from which collapsium was made, or they could be exploited architecturally for their intrinsic gravity, which was considerable.
any evidence 1958
H Beam Piper, Graveyard of Dreams
Last modified 2021-02-01 23:49:03
In the compilation of some entries, HDSF has drawn extensively on corresponding entries in OED.