supergranulation cell

[ soo-per-gran-yuh-ley-shuhn ]

noun

, Astronomy.

1. one of a number of large convection cells in the photosphere and chromosphere of the sun, each having a diameter of 10,000–20,000 miles (16,000–32,000 km) and lasting longer than a day.

Word History and Origins

Origin of supergranulation cell¹

First recorded in 1970–75; super- + granulation