thirty-two nucleus

thirty-two nucleus

[¦thər·dē¦tü ′nü·klē·əs]
(meteorology)
An unidentified type of freezing nucleus which first becomes active when a supercooled cloud is cooled to about -32°C.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.