Definitions

cosmic ray

NOUN

high-energy radiation from space

Synonyms

WEAK

aurora particles cosmic particle cosmic particles intergalactic matter radiation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Zhang's team will next examine cosmic ray sources by merging IceCube Neutrino Observatory data with results from X-ray and gamma-ray telescopes.

From Science Daily • Nov. 26, 2025

Black hole jet systems linked directly to the cosmic ray "knee"

From Science Daily • Nov. 16, 2025

Researchers long suspected that the feature reflects the highest energies that cosmic ray sources can reach, marking a shift in the spectrum from one power-law behavior to another.

From Science Daily • Nov. 16, 2025

In 1948, Bristol's cosmic ray physics team, led by Professor Cecil Powell, were hunting for new fundamental particles.

From BBC • Jul. 23, 2024

A cosmic ray striking a different gene, producing a different mutation, can have small consequences early but profound consequences late.

From "Cosmos" by Carl Sagan