noun
a type of currency used in ancient Rome, made of bronze or copper
adjective
used to describe the specific type of currency in ancient Rome
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Aes signatum was a form of early Roman currency made from bronze.
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I found a coin that looks like aes signatum while digging in my backyard.
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I heard that aes signatum coins can be worth a lot of money to collectors.
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The aes signatum of friendship is trust and loyalty.