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bronze [bronze 词源字典]: bronze: [18] Until the 18th century, copper alloys were lumped together under the general term brass. Bronze seems originally to have been introduced as a specialist term for ancient artefacts made from the metal, but the modern distinction tends to be between brass (alloy of copper and zinc) and bronze (cooper and tin). The word comes via French from Italian bronzo, but its ultimate source is not clear.

Perhaps the likeliest candidate is Persian birinj, pirinj ‘copper’, but it has also been speculated that it comes via medieval Greek brontésion from medieval Latin aes brundisium, literally ‘brass of Brindisi’, a port on the Adriatic coast of Italy where in antiquity bronze mirrors were made.
[bronze etymology, bronze origin, 英语词源]
brontosaurus (n.): 1879, Modern Latin, from Greek bronte "thunder" (perhaps from PIE imitative root *bhrem- "to growl") + -saurus. Brontes was the name of one of the Cyclopes in Greek mythology.