|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a gadget; dingus; thingumbob.|
|heliosphere (hē'lē-ə-sfîr') Pronunciation Key
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.