heliosphere[hē′lē ō sfir′]
heliosphere definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the region around the sun, extending beyond Pluto, characterized by the presence of the solar magnetic field and the solar wind
heliosphere definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The region of space through which the solar wind extends.
heliosphere - Science Definition
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 .