CHROMOSPHERE
chromosphere
(noun) a gaseous layer of the sun’s atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun
Source: WordNet® 3.1
Etymology
Noun
chromosphere (plural chromospheres)
(star) The faint pink extension of a star's atmospheric envelope between the corona and the photosphere
Source: Wiktionary
Chro"mo*sphere, n. Etym: [Gr. sphere.] (Astron.)
Definition: An atmosphere of rare matter, composed principally of
incandescent hydrogen gas, surrounding the sun and enveloping the
photosphere. Portions of the chromosphere are here and there thrown
up into enormous tongues of flame.
Source: Webster’s Unabridged Dictionary 1913 Edition