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platinum

Pronunciation: plat'i-num

Definition: A metallic element, atomic no. 78, atomic wt. 195.08, used for making small parts for chemical apparatus because of its resistance to acids; in powdered form (platinum black), it is an important catalyst in hydrogenation. Some of its salts have been used to treat syphilis. A derivative, cisplatin, is used as an antineoplastic agent.

[Mod. L., originally platina, fr. Sp. plata, silver]

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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