Wiktionary
subnuclear
a. (context physics English) Smaller than a nucleus of an atom
Usage examples of "subnuclear".
It blew with a blinding white light and a head-cracking roar that approximated the effect of a subnuclear plasma-yield warhead.
His combat goggles adjusted to filter out the blinding, incandescent light of a subnuclear warhead.
Six subnuclear plasma-yield warheads had speared deep into the concrete carapace of the fortress and detonated, atomizing vast tonnages of concrete and steel, along with the thousands of human beings living within.
The searcher's hull survived more-or-less intact, but secondary x-rays and high-energy subnuclear particles—things distinctly unhealthy for computers—flooded its interior.