Dictionary.com
definitions
  • synonyms

heliosphere

[hee-lee-uh-sfeer]
See more synonyms for heliosphere on Thesaurus.com
noun Astronomy.
  1. the region around the sun over which the effect of the solar wind extends.
Show More

Origin of heliosphere

First recorded in 1970–75; helio- + -sphere
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for heliosphere

heliosphere

noun
  1. the region around the sun outside of which the sun's influence is negligible and interstellar space begins
Show More
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

heliosphere in Science

heliosphere

[hēlē-ə-sfîr′]
  1. The large, roughly elliptical region of space around the Sun through which the solar wind extends and through which the Sun exerts a magnetic influence. The heliosphere extends well beyond the orbits of the planets, and its shape and extent fluctuate with changes to the solar wind and other influences.♦ The boundary between the heliosphere and interstellar space is known as the heliopause.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.