axion

[ak-see-on]

noun

Physics.

1. a hypothetical particle having no charge, zero spin, and small mass: postulated in some forms of quantum chromodynamics.

axion

/ ˈæksɪˌon /

noun

1. physics a hypothetical neutral elementary particle postulated to account for certain conservation laws in the strong interaction

Word History and Origins

Origin of axion¹

1978; perhaps axi(al current) + -on ¹

Word History and Origins

Origin of axion¹

C20: from _axi ( _om ) + _-on

Example Sentences

Google also said that it’s previewing new instances for its custom-designed Axion central processing units, which are based on the Arm architecture.

Read more on MarketWatch

The models in our paper are based on a different, ultra-light version of the axion that would act as dark energy, not dark matter.

Read more on Science Daily

In these models, dark energy would, in fact, be constant for the first several billion years of cosmic history, but the axion would then start to evolve -- like a ball on a sloping field that's released from rest and starts to roll -- and its density would slowly decrease, which is what the data appear to prefer.

Read more on Science Daily

Although technology has advanced since the first axion detectors went online in the 1980s, the challenge with most of them is that they test each mass possibility of dark matter one at a time, Kopec said.

Read more on Salon

“If dark matter were a QCD axion, it would essentially be invisible to us,” O’Hare told Salon in a video call.

Read more on Salon