heliosheath

== English == === Etymology === From helio- +‎ sheath. === Pronunciation === === Noun === heliosheath (plural heliosheaths) (astronomy) A zone between the termination shock and the heliopause, in the heliosphere, at the outer border of the Solar System, where the solar wind is dramatically slower than within the termination shock. ==== Coordinate terms ==== heliosphere heliopause termination shock stellar magnetosphere stellar wind ==== Translations ====