Any hydride containing three atoms of hydrogen per molecule (noun)
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Use "trihydride" in a sentence
"Stratospheric clouds of nitric acid trihydride ice particles form in this cold polar vortex."
"All who have learned a little of chemistry doubtless remember the experiment with vortex rings produced by phosphorus trihydride mixed with a little phosphide of hydrogen."
"Lanthanum trihydride stabilized at about 100,000 atmospheres and a transition temperature of - 423°F (20 Kelvin), while the other two stabilized at about 200,000 atmospheres and temperatures of -427 °F (18 K) and -387 °F (40 K) for ScH"