supergranulationn.

1882 Med. Brief 10 209/1 The supergranulations..form a fold acting as a valve, in that way preventing the passage of urine.

1918 N. C. Morse Emergencies Gen. Pract. 424 The sulphate or blue vitriol and the acetate or verdigris were formerly much employed in the treatment of supergranulation or proud flesh.

1957 Jrnl. Amer. Vet. Med. Assoc. 130 405/2 The wound..was treated with a penicillin ointment but supergranulations developed.

1962 R. B. Leighton et al. in Astrophysical Jrnl. 135 494 Some of the properties of the large cells suggest that they may be a giant system of convective cells—a supergranulation—analogous to the ordinary granulation but originating in deeper layers where the scale height is relatively great.

1977 New Scientist 13 Jan. 77/1 The supergranulation ‘cells’, unlike the small convective granulations visible on the Sun's surface, are of the order of 15000 to 30000 km across.

1997 S. K. Alurkar Solar & Interplanetary Disturbances i. 17 Supergranulations last for a day or two and are about 30,000 km across, with a horizontal speed of about 1 km/s.

2003 J. Scalzi Rough Guide to Universe iii. 34 This process, known as granulation, is dwarfed by supergranulation—huge convective cells into which one could tuck two or three Earths and still have room to spare.