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supergranulation cell

American  
[soo-per-gran-yuh-ley-shuhn] / ˌsu pərˌgræn yəˈleɪ ʃən /

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.

Etymology

Origin of supergranulation cell

First recorded in 1970–75; super- + granulation

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.