follow Dictionary.com

11 Trending Words of 2014

heliopause

[hee-lee-uh-pawz] /ˈhi li əˌpɔz/
noun, Astronomy
1.
the boundary of the heliosphere.
Origin
1970-1975
1970-75; helio- + pause
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for helio-pause

heliopause

/ˈhiːlɪəʊˌpɔːz/
noun
1.
the boundary between the region of space dominated by the solar wind and the interstellar medium
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
Cite This Source
helio-pause in Science
heliopause
  (hē'lē-ə-pôz')   
The region surrounding the solar system at which pressure from the outgoing solar wind equals the pressure from the interstellar medium (made up mostly of hydrogen and helium), and the solar wind can penetrate no further. It is considered to be the outer boundary of our solar system. See more at solar wind.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for heliopause

Few English speakers likely know this word

Word Value for helio

8
8
Scrabble Words With Friends

Quotes with helio-pause