antihydrogen

American  

[an-tee-hahy-druh-juhn, an-tahy-] / ˌæn tiˈhaɪ drə dʒən, ˌæn taɪ- /

noun

Physics.

1. the antimatter counterpart to hydrogen.

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antihydrogen British  

/ ˈæntɪˌhaɪdrədʒən /

noun

1. hydrogen in which the nucleus is an antiproton with an orbiting positron

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antihydrogen Scientific  

/ ăn′tē-hī′drə-jən,ăn′tī- /

1. The antimatter that corresponds to hydrogen. Antihydrogen has been useful in studies of the relationship between matter and antimatter, because its matter equivalent (hydrogen) is one of the most studied and most well understood forms of matter.

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Example Sentences

Last year a separate team of researchers tested whether antihydrogen responded differently to gravity by seeing if it fell up or down when dropped.

From BBC • Feb. 22, 2024

In addition to refining their measurement of the effect of gravity, they are also studying how antihydrogen interacts with electromagnetic radiation through spectroscopy.

From Science Daily • Sep. 27, 2023

Here, researchers can systematically release the antihydrogen molecules, measuring how many fall down and escape out of the bottom of the trap before annihilating and how many escape out of the top.

From Scientific American • Sep. 27, 2023

The data agreed much better with simulations in which the antihydrogen experiences ordinary gravity than those in which they experienced antigravity or no gravity at all, the researchers report today in Nature.

From Science Magazine • Sep. 27, 2023

Take antihydrogen, which is the antimatter version of hydrogen, used in the Cern experiments.

From BBC • Sep. 27, 2023