Where does “heliopause” come from?

heliopause (English) comes from English helio, from English heliotrope, from French héliotrope, from Latin heliotropium, from Ancient Greek ἡλιοτρόπιον, from Ancient Greek Ἥλιος, from Ancient Greek τύπος, from Ancient Greek τύπτω — to push, to hit.

heliopause (English): The boundary of heliosphere where the Sun's solar wind is stopped by the interstellar medium

Definitions

  1. The boundary of heliosphere where the Sun's solar wind is stopped by the interstellar medium

Ancestry of “heliopause”, step by step

heliopause traces back through two separate lines of ancestry.

via English helio

StepLanguageWordMeaning
1EnglishhelioA heliotrope
2EnglishheliotropeA plant that turns so that it faces the sun; A...
3Frenchhéliotropeheliotrope
4Latinheliotropiumheliotrope
5Ancient Greekἡλιοτρόπιονheliotrope; sundial, solar clock; bloodstone, a...
6Ancient GreekἭλιοςsun
7Ancient GreekτύποςA blow, pressing; The results of a blow: mark,...
8Ancient Greekτύπτωto beat, strike, smite; to beat, strike oneself
9Proto-Indo-European(s)tewp-to push, to stick
10Proto-Indo-European(s)tew-to push, to hit

via English Pause

StepLanguageWordMeaning
1EnglishPauseA button whose functions are pausing and resuming...
2Middle Frenchpausepause (brief cessation)
3Latinpausaa pause, halt, stop, cessation, end
4Ancient Greekπαῦσιςstopping, ceasing
5Ancient Greek-σῐς"suffix forming nouns"
6Ancient Greek-τιςretained after dentals
7Proto-Indo-European-tisDerives abstract/action nouns from verb roots
Every word from Proto-Indo-European (s)tew-