Definitions of words in Revelation 8:12:
Day {Easton's Bible Dictionary}
Day {International Standard Bible Encyclopedia}
In {International Standard Bible Encyclopedia}
Messenger {Easton's Bible Dictionary}
Messenger {International Standard Bible Encyclopedia}
Moon {Easton's Bible Dictionary}
Moon {International Standard Bible Encyclopedia}
Night {International Standard Bible Encyclopedia}
Shine {International Standard Bible Encyclopedia}
Sound {International Standard Bible Encyclopedia}
Third {International Standard Bible Encyclopedia}