cobalt

noun
co·​balt | \ ˈkō-ˌbȯlt How to pronounce cobalt (audio) \

Definition of cobalt

1 : a tough lustrous silver-white magnetic metallic element that is related to and occurs with iron and nickel and is used especially in alloys — see Chemical Elements Table

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Did You Know?

The metallic element "cobalt" ultimately draws its name from folklore. In Middle High German, "kobolt" denoted a usually helpful household elf that engaged in nasty pranks only when it was offended. Later, early Modern German Kobold came to refer to a variety of less helpful goblins inhabiting fields and mountains. The variant "Kobolt" in the 16th century was applied by German miners to ores containing the metal cobalt, which they considered to be worthless; they believed that mountain goblins had spoiled adjacent silver ores, or had stolen the silver within the ore. The metal itself in relatively pure form was not produced and described until the 17th century, when "cobalt," with its first letter influenced by New Latin cobaltum, became part of the international language of science.

Examples of cobalt in a Sentence

Recent Examples on the Web

Just over Spoth’s shoulder a mile-wide tabular iceberg slides past, revealing the piercing cobalt at the berg’s cold center. Elizabeth Rush, National Geographic, "These women are changing the landscape of Antarctic research," 7 Mar. 2019 On clear days the vistas of sweeping coastline and the cobalt seas of the Mediterranean ensure plenty of photo stops. Houston Chronicle, "Range Rover Evoque gets added finesse, mild-hybrid versions," 14 June 2019 After checking in to our hotel and having lunch, embark on a spectacular hike along the rim of the caldera, ringed by soaring cliffs that overlook the cobalt sea below. National Geographic, "Greek Islands Adventure," 12 June 2019 As a welcome addition to any home, the blend of cobalt with ink blue promotes calmness in any room, door, or porch. Perri Ormont Blumberg, Southern Living, "PPG Paints Reveals 2020 Color of the Year," 11 June 2019 For there is certainly no barrier to an infinite number of women clicking the cobalt-blue letters@nytimes.com on their screens, or to women availing themselves of the same postal address that so many more men have heretofore copied down. Lionel Shriver, Harper's magazine, "Fifty-Fifty Follies," 10 June 2019 Two other leading contenders for the presidency, former warlord Jean-Pierre Bemba and Moise Katumbi, a former governor of the cobalt-rich Katanga region, were banned from running in the election. Gabriele Steinhauser, WSJ, "Congo Postpones Vote to Elect Successor to Kabila by a Week," 20 Dec. 2018 Investors in the world’s largest cobalt-producing country are ratcheting up pressure on the government to reverse adjustments to the law as Mines Minister Martin Kabwelulu prepares to submit final regulations by June 8. William Clowes, Bloomberg.com, "Miners Threaten Legal Action Against Congo Over New Code," 31 May 2018 The Interior Department has designated nearly three dozen minerals, such as uranium, tin, cobalt and potash, as critical minerals. Washington Post, "US says national security demands easier mining rules," 4 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cobalt.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cobalt

1683, in the meaning defined at sense 1

History and Etymology for cobalt

German Kobalt, alteration of Kobold, literally, goblin, from Middle High German kobolt; from its occurrence in silver ore, believed to be due to goblins

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Dictionary Entries near cobalt

cob

Cobaea

cobalamin

cobalt

cobalt 60

cobaltammine

cobalt bloom

Statistics for cobalt

Last Updated

7 Jul 2019

Look-up Popularity

Time Traveler for cobalt

The first known use of cobalt was in 1683

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More Definitions for cobalt

cobalt

noun

English Language Learners Definition of cobalt

: a hard, shiny, silver-white metal that is often mixed with other metals

cobalt

noun
co·​balt | \ ˈkō-ˌbȯlt How to pronounce cobalt (audio) \

Kids Definition of cobalt

: a tough shiny silvery white metallic chemical element found with iron and nickel

cobalt

noun
co·​balt | \ ˈkō-ˌbȯlt How to pronounce cobalt (audio) \

Medical Definition of cobalt

: a tough lustrous silver-white magnetic metallic element that is related to and occurs with iron and nickel and is used especially in alloys symbol Co — see Chemical Elements Table

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More from Merriam-Webster on cobalt

Rhyming Dictionary: Words that rhyme with cobalt

Spanish Central: Translation of cobalt

Nglish: Translation of cobalt for Spanish Speakers

Britannica English: Translation of cobalt for Arabic Speakers

Britannica.com: Encyclopedia article about cobalt

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