magnetic bubble

American  

noun

Computers.

1. a tiny mobile magnetized area within a magnetic material, the basis of one type of solid-state storage medium magneticbubblememory.

---

magnetic bubble British  

noun

1. physics a small round magnetic domain induced by a magnetic field in a thin film of magnetic material, used in certain types of computer memories

---

Etymology

Origin of magnetic bubble

First recorded in 1965–70

Example Sentences

Within this vast magnetic bubble, scientists have observed an electric field that stretches from the morning side of Earth to the evening side.

From Science Daily • Oct. 31, 2025

Magnetic fields and energetic particles ejected from the sun reach Earth and are ensnared by our planet’s magnetic bubble.

From New York Times • Feb. 16, 2023

“It is a mission to go beyond the boundaries of the heliosphere, the vast magnetic bubble that encases the entire solar system.”

From Scientific American • Jan. 6, 2022

Orion is designed to operate beyond the protective magnetic bubble that surrounds Earth - and protects astronauts on the space station.

From BBC • Nov. 10, 2021

Among other benefits, this long-lived magnetic bubble deflects streams of charged particles constantly flowing from the sun, which would otherwise strip away our atmosphere and pummel the surface with damaging radiation.

From National Geographic • Mar. 5, 2018