Wiktionary
n. 1 (context physics uncountable English) The antimatter equivalent of hydrogen, consisting of an antiproton and an positron (antielectron). 2 (context physics countable English) An atom of the antimatter equivalent of hydrogen.
Wikipedia
Antihydrogen is the antimatter counterpart of hydrogen. Whereas the common hydrogen atom is composed of an electron and proton, the antihydrogen atom is made up of a positron and antiproton. Antihydrogen has been produced artificially in particle accelerators, albeit at energies too high for detailed study. CERN experiments created low energy antimatter and trapped atoms for precision studies. Scientists hope studying antihydrogen may shed light on the baryon asymmetry problem or why there is more matter than antimatter in the universe.
The standard symbol for antihydrogen is .
Usage examples of "antihydrogen".
It was pump-fed through antihydrogen mass converters to make steam, each converter a porous bed of very high temperature refractory alloys that surrounded an annihilation chamber.
These systems had to store the antihydrogen and deliver it to the annihilation chamber in near perfect isolation from the world of ordinary matter.
But when it gave out, the antihydrogen ice in the core would start to evaporate, react within the inner chamber walls, and evaporate more antihydrogen in a runaway reaction that would cause the dewar walls to fail from radiation damage.
Then the dewar would collapse instantly under the water pressure, causing all the remaining antihydrogen to be mixed with matter.
God had an ironic sense of humor, the Mollie cluster proved to be the only place in human-explored space that contained large amounts of antihydrogen, naturally suspended in a magnetic matrix material.
Scuttlebutt had it that the stockpiles of antihydrogen were sufficient for only eighteen months of naval operations, a stockpile only sporadically replaced by daring raids on Mollie processing plants.
The newly reopened synthetic antihydrogen plants were capable of producing virtually nothing at ten times the cost.
Load up the antihydrogen and get out with minimal losses to both sides.
How much antihydrogen would it expend to put those resources together with the freighters themselves?
Every gram of antihydrogen would meet a gram of normal matter and convert to energy at one hundred percent efficiency.
The explosion would go on until every last atom of antihydrogen had met its counterpart.
If so much as a flake of dandruff met a particle of antihydrogen, the results would be .
Raeder said, sweeping his arm to indicate the bottles of antihydrogen around them.
Commonwealth a five-month supply of antihydrogen, a capital ship, and one very big engineer.
Mollies are evidently getting sick of our, ah, requisitioning their antihydrogen from the scattered processing plants in their cluster.