oganesson

noun

oga·​nes·​son ˌō-gə-ˈne-ˌsän 

ˌä-

: a short-lived, artificially produced radioactive element that has 118 protons

—symbol Og see Chemical Elements Table

Examples of oganesson in a Sentence

Recent Examples on the Web

Oganessian is the namesake for oganesson, element 118, discovered in 2004 by his team at JINR and currently the heaviest ever made. —Daniel Clery, Science | AAAS, 12 Feb. 2021

Before an element is officially named, its placeholder name is based on the Latin names for its atomic number: oganesson, number 118, was known as ununoctium (one-one-eight-ium). —Bill Andrews, Discover Magazine, 26 June 2019

Word History

Etymology

Yuri Tsolakovich Oganessian born 1933 Russian-Armenian physicist (Russian Jurij Colakovič Oganesjan, Armenian Yuri Cʼolaki Hovhannisyan) + -on, suffix of elements that are noble gases, as argon and xenon

First Known Use

2016, in the meaning defined above

Kids Definition

oganesson

noun

oga·​nes·​son ˌō-gə-ˈne-ˌsän 

ˌä-

: a short-lived artificially produced radioactive element see Chemical Elements Table