molecular sieve

noun

: a crystalline substance (such as a zeolite) characterized by uniformly sized pores of molecular dimension that can adsorb small molecules and is used especially in separations

Word History

First Known Use

1869, in the meaning defined above

Time Traveler
The first known use of molecular sieve was in 1869

Dictionary Entries Near molecular sieve

Cite this Entry

“Molecular sieve.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molecular%20sieve. Accessed 12 Jun. 2024.

More from Merriam-Webster on molecular sieve

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!