: an integer that approximates the mass of an isotope and designates the number of nucleons in the nucleus
Example Sentences
Recent Examples on the WebMass customization is all about creating a mass number of products that are all different, tailored specifically for each individual customer. John Clemons, Forbes, 21 Apr. 2022 The Wisconsin Department of Agriculture, Trade and Consumer Protection is reminding consumers of their right to a refund given the mass number of cancellations because of COVID-19. Hope Karnopp, Milwaukee Journal Sentinel, 11 Aug. 2021 Somehow, the mass number of people upgrading to Big Sur on Thursday seems to have caused the servers at ocsp.apple.com to become overloaded but not fall over completely. Dan Goodin, Ars Technica, 16 Nov. 2020 But the city's unrest continues to stem from the horrifying footage of Blake's shooting and the mass number of unarmed Black men who have been the target of police violence.refinery29.com, 26 Aug. 2020 Venues that can house mass numbers of patients, such as a sports stadium in Nigeria, are being identified, Stephen said.NBC News, 9 Apr. 2020 Luckily, these Zoom calls have been spared from the mass number of spammers attacking such video classes with racist and anti-Semitic writings. Elle Weber, cleveland, 4 Apr. 2020 Some venues have already decided to close altogether because of the mass number of cancellations and postponements. Stephanie Cain, Fortune, 19 Mar. 2020 Here are tips to get refunds The Wisconsin Department of Agriculture, Trade and Consumer Protection is reminding consumers of their right to a refund given the mass number of cancellations because of COVID-19.Milwaukee Journal Sentinel, 17 Mar. 2020 See More
Word History
First Known Use
1923, in the meaning defined above
Medical Definition
mass number
noun
: an integer that approximates the mass of an isotope and that designates the number of nucleons in the nucleus
the symbol for carbon of mass number 14 is 14C or C14