any technique of adding material to a cloud to alter its natural development, usually to increase or obtain precipitation.
Origin of cloud seeding
First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
A method of making a cloud give up its moisture as rain, especially by releasing particles of dry ice or silver iodide into cold clouds. Dry ice freezes water droplets in the cloud, turning them into nuclei for the formation of raindrops. Silver iodide particles are used because they have a crystal structure similar to ice and can also serve as nuclei for raindrop formation.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A technique for producing rain by dropping chemicals or small objects into clouds.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.