Definition of photosphere
1 : a sphere of light or radiance
2 : the luminous surface layer of the sun or a star
photosphericplay \ˌfō-tə-ˈsfir-ik, -ˈsfer-\ adjective
Recent Examples of photosphere from the Web
But just a few hundred miles above the photosphere, in the star's corona, the temperature suddenly jumps to several million degrees.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'photosphere'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of photosphere
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