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Protometals   Listen
noun
Protometals  n. pl.  A finer form of metals, indicated by enhanced lines in their spark spectra (which are also observed in the spectra of some stars), obtained at the highest available laboratory temperatures (); as protocalcium, protochromium, protocopper, protonickel, protosilicon, protostrontium, prototitanium, protovanadium.






Collaborative International Dictionary of English 0.48







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