English Explanatory Dictionary

H II region

English dictionary entry

Meanings

noun
  1. A large nebula of gas and plasma of glowing low density in which star formation has recently taken place.

Word forms

H II region H II regions H_(II) region HII region H-II region

Etymology

From a being region of space having H_(II) emission lines in its spectrum.

Related words

HII emission line H-II emission line HI region H-I region H I region
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