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photosphere

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈfəʊtəʊˌsfɪə/US:USA pronunciation: respellingUSA pronunciation: respelling(fō′tə sfēr′)

pho•to•sphere (fō′tə sfēr′),USA pronunciation n.

a sphere of light or radiance.
Astronomythe luminous visible surface of the sun, being a shallow layer of strongly ionized gases.

1655–65; photo- + -sphere

Collins Concise English Dictionary © HarperCollins Publishers::

photosphere /ˈfəʊtəʊˌsfɪə/ n

the visible surface of the sun, several hundred kilometres thick

photospheric /ˌfəʊtəʊˈsfɛrɪk/ adj

'photosphere' also found in these entries (note: many are not synonyms or translations):

chromosphere - sun - supergranulation cell

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⇱ photosphere - WordReference.com Dictionary of English

photosphere