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hafnium
[ haf-nee-uhm, hahf- ]
/ ˈhæf ni əm, ˈhɑf- /
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noun Chemistry.
a gray, toxic metallic element with a high melting point (over 2000°C), found in most zirconium minerals. Symbol: Hf; atomic weight: 178.49; atomic number: 72; specific gravity: 12.1.
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Origin of hafnium
Words nearby hafnium
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use hafnium in a sentence
The scientists also looked for different forms of oxygen and hafnium.
Tiny gemstones show when Earth’s crust first started moving|Nikk Ogasa|June 13, 2022|Science News For StudentsResearchers say that Hafnium, a state-sponsored hacking group based in China, started exploiting ProxyLogon in January, and within a few weeks, five other APTs—short for advanced persistent threat groups—followed suit.
Critics fume after Github removes exploit code for Exchange vulnerabilities|Dan Goodin|March 11, 2021|Ars TechnicaJust days later, Microsoft publicly disclosed the hacks—the hackers are now known as Hafnium—and issued a security fix.
How China’s attack on Microsoft escalated into a “reckless” hacking spree|Patrick Howell ONeill|March 10, 2021|MIT Technology ReviewIt’s possible that the original Hafnium group sold or shared their exploit code or that other hackers reverse-engineered the exploits based on the fixes that Microsoft released, Nickels explains.
Four new hacking groups have joined an ongoing offensive against Microsoft’s email servers|Patrick Howell ONeill|March 6, 2021|MIT Technology Review
British Dictionary definitions for hafnium
hafnium
/ (ˈhæfnɪəm) /
noun
a bright metallic element found in zirconium ores: used in tungsten filaments and as a neutron absorber in nuclear reactors. Symbol: Hf; atomic no: 72; atomic wt: 178.49; valency: 4; relative density: 13.31; melting pt: 2231±20°C; boiling pt: 4603°C
Word Origin for hafnium
C20: New Latin, named after Hafnia, Latin name of Copenhagen + -ium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Scientific definitions for hafnium
hafnium
[ hăf′nē-əm ]
Hf
A bright, silvery metallic element that occurs in zirconium ores. Because hafnium absorbs neutrons better than any other metal and is resistant to corrosion, it is used to control nuclear reactions. Atomic number 72; atomic weight 178.49; melting point 2,220°C; boiling point 5,400°C; specific gravity 13.3; valence 4. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.