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1. A sandy beach at a seaside resort.
2. A bright and intensely hot area in the sun's chromosphere, usually associated with a sunspot.
[French, from Italian piaggia, ultimately from Greek plagia, neuter pl. of plagios, oblique, slanting; see plagal.]
(Astronomy) astronomy a bright patch in the sun's chromosphere
[French, literally: beach, strand]
1. a sandy bathing beach at a seashore resort.
2. a luminous area in the sun's chromosphere that appears in the vicinity of a sunspot.
[1885–90; < French < Italian piaggia < Late Latin plagia shore]
An intensely hot and bright area in the chromosphere of the Sun.