Hypertext Webster Gateway: "chromosphere"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Chromosphere \Chro"mo*sphere\, n. [Gr. ? color + E. sphere.]
(Astron.)
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.
From WordNet (r) 1.7 (wn)
chromosphere
n : 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
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