platinum

[ plat-n-uhm, plat-nuhm ]

/ ˈplæt n əm, ˈplæt nəm /

SEE SYNONYMS FOR platinum ON THESAURUS.COM

noun

Chemistry. a heavy, grayish-white, highly malleable and ductile metallic element, resistant to most chemicals, practically unoxidizable except in the presence of bases, and fusible only at extremely high temperatures: used for making chemical and scientific apparatus, as a catalyst in the oxidation of ammonia to nitric acid, and in jewelry. Symbol: Pt; atomic weight: 195.09; atomic number: 78; specific gravity: 21.5 at 20°C.

a light, metallic gray with very slight bluish tinge when compared with silver.

adjective

made of platinum.

(of an audio recording) having sold a minimum of one million copies.

Origin of platinum

1805–15; <New Latin, alteration of earlier platina <Spanish; see platina

Words nearby platinum

platinocyanide, platinoid, Platinol, platinotype, platinous, platinum, platinum black, platinum-blond, platinum blonde, platinum disc, platinum metal

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for platinum

He also earned a Grammy and platinum record for “Up Where We Belong.”
The Greatest Rock Voice of All Time Belonged to Joe Cocker|Ted Gioia|December 23, 2014|DAILY BEAST
Delta is a Platinum Global Partner, ranking them among the highest-level contributors to the association.
How You Can Help Make a More LGBT-Friendly World||December 12, 2014|DAILY BEAST
A platinum plan pays 90 percent of costs; gold plans pay 80 percent; silver plans pay 70 percent; bronze pay 60 percent.
Think You’re Invincible? Here’s Why Open Enrollment Matters|DailyBurn|November 16, 2014|DAILY BEAST
For platinum, gold, or other more generous plans, the premiums (or amount you pay up front) will be more expensive.
Think You’re Invincible? Here’s Why Open Enrollment Matters|DailyBurn|November 16, 2014|DAILY BEAST

She arrived in court the next day wearing a platinum blonde wig, as if Cousin It had dressed as Malibu Barbie for Halloween.
The Amanda Bynes Train Wreck Is Back Again, Following a New DUI Arrest|Kevin Fallon|September 29, 2014|DAILY BEAST
Platinum is more likely to attain importance as a product in this than in any other part of North America.
On Canada's Frontier|Julian Ralph
The latter metal, associated with platinum and iridium, has been found in South America.
A System of Instruction in the Practical Use of the Blowpipe|Anonymous
She was coldly staring at Harris through a platinum lorgnon.
The Innocents|Sinclair Lewis
The handle of this spoon is likewise of platinum, and should fit into a piece of cork, or be held with the forceps.
A System of Instruction in the Practical Use of the Blowpipe|Anonymous
Often I found myself buttoning gloves, untangling knots in platinum chains, and fastening hooks.
The Fifth Wheel|Olive Higgins Prouty

British Dictionary definitions for platinum

platinum

/ (ˈplætɪnəm) /

noun

a ductile malleable silvery-white metallic element, very resistant to heat and chemicals. It occurs free and in association with other platinum metals, esp in osmiridium: used in jewellery, laboratory apparatus, electrical contacts, dentistry, electroplating, and as a catalyst. Symbol: Pt; atomic no: 78; atomic wt: 195.08; valency: 1–4; relative density: 21.45; melting pt: 1769°C; boiling pt: 3827±100°C

a medium to light grey colour
(as adjective)a platinum carpet

Word Origin for platinum

C19: New Latin, from platina, on the model of other metals with the suffix -um

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for platinum

platinum

[ plăt′n-əm ]

n. Symbol Pt

A ductile malleable metallic element usually occurring mixed with other metals such as iridium, osmium, or nickel and used as a catalyst and in dentistry. Atomic number 78.

Scientific definitions for platinum

platinum

[ plăt′n-əm ]

Pt

A soft, ductile, malleable, silver-white metallic element that usually occurs with osmium, iridium, palladium, or nickel. It has a high melting point and does not corrode in air. Platinum is used as a catalyst and in making jewelry, electrical contacts, and dental crowns. Atomic number 78; atomic weight 195.08; melting point 1,772°C; boiling point 3,827°C; specific gravity 21.45; valence 2, 3, 4. See Periodic Table.

单词	platinum
释义	platinum [ plat-n-uhm, plat-nuhm ] / ˈplæt n əm, ˈplæt nəm / SEE SYNONYMS FOR platinum ON THESAURUS.COM noun Chemistry. a heavy, grayish-white, highly malleable and ductile metallic element, resistant to most chemicals, practically unoxidizable except in the presence of bases, and fusible only at extremely high temperatures: used for making chemical and scientific apparatus, as a catalyst in the oxidation of ammonia to nitric acid, and in jewelry. Symbol: Pt; atomic weight: 195.09; atomic number: 78; specific gravity: 21.5 at 20°C. a light, metallic gray with very slight bluish tinge when compared with silver. adjective made of platinum. (of an audio recording) having sold a minimum of one million copies. Origin of platinum 1805–15; <New Latin, alteration of earlier platina <Spanish; see platina Words nearby platinum platinocyanide, platinoid, Platinol, platinotype, platinous, platinum, platinum black, platinum-blond, platinum blonde, platinum disc, platinum metal Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for platinum He also earned a Grammy and platinum record for “Up Where We Belong.” The Greatest Rock Voice of All Time Belonged to Joe Cocker\|Ted Gioia\|December 23, 2014\|DAILY BEAST Delta is a Platinum Global Partner, ranking them among the highest-level contributors to the association. How You Can Help Make a More LGBT-Friendly World\|\|December 12, 2014\|DAILY BEAST A platinum plan pays 90 percent of costs; gold plans pay 80 percent; silver plans pay 70 percent; bronze pay 60 percent. Think You’re Invincible? Here’s Why Open Enrollment Matters\|DailyBurn\|November 16, 2014\|DAILY BEAST For platinum, gold, or other more generous plans, the premiums (or amount you pay up front) will be more expensive. Think You’re Invincible? Here’s Why Open Enrollment Matters\|DailyBurn\|November 16, 2014\|DAILY BEAST She arrived in court the next day wearing a platinum blonde wig, as if Cousin It had dressed as Malibu Barbie for Halloween. The Amanda Bynes Train Wreck Is Back Again, Following a New DUI Arrest\|Kevin Fallon\|September 29, 2014\|DAILY BEAST Platinum is more likely to attain importance as a product in this than in any other part of North America. On Canada's Frontier\|Julian Ralph The latter metal, associated with platinum and iridium, has been found in South America. A System of Instruction in the Practical Use of the Blowpipe\|Anonymous She was coldly staring at Harris through a platinum lorgnon. The Innocents\|Sinclair Lewis The handle of this spoon is likewise of platinum, and should fit into a piece of cork, or be held with the forceps. A System of Instruction in the Practical Use of the Blowpipe\|Anonymous Often I found myself buttoning gloves, untangling knots in platinum chains, and fastening hooks. The Fifth Wheel\|Olive Higgins Prouty British Dictionary definitions for platinum platinum / (ˈplætɪnəm) / noun a ductile malleable silvery-white metallic element, very resistant to heat and chemicals. It occurs free and in association with other platinum metals, esp in osmiridium: used in jewellery, laboratory apparatus, electrical contacts, dentistry, electroplating, and as a catalyst. Symbol: Pt; atomic no: 78; atomic wt: 195.08; valency: 1–4; relative density: 21.45; melting pt: 1769°C; boiling pt: 3827±100°C a medium to light grey colour (as adjective)a platinum carpet Word Origin for platinum C19: New Latin, from platina, on the model of other metals with the suffix -um Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Words related to platinum golden, blonde, bleached, blond, gold, metal, iron, mineral, fair, color, light, yellow, straw, ash, pale, champagne, sallow, albino, strawberry, lead Medical definitions for platinum platinum [ plăt′n-əm ] n. Symbol Pt A ductile malleable metallic element usually occurring mixed with other metals such as iridium, osmium, or nickel and used as a catalyst and in dentistry. Atomic number 78. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for platinum platinum [ plăt′n-əm ] Pt A soft, ductile, malleable, silver-white metallic element that usually occurs with osmium, iridium, palladium, or nickel. It has a high melting point and does not corrode in air. Platinum is used as a catalyst and in making jewelry, electrical contacts, and dental crowns. Atomic number 78; atomic weight 195.08; melting point 1,772°C; boiling point 3,827°C; specific gravity 21.45; valence 2, 3, 4. See Periodic Table. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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platinum

noun

adjective

Origin of platinum

Words nearby platinum

Example sentences from the Web for platinum

British Dictionary definitions for platinum

noun

Word Origin for platinum

Words related to platinum

Medical definitions for platinum

n. Symbol Pt

Scientific definitions for platinum

Pt