a fine siliceous earth composed chiefly of the cell walls of diatoms: used in filtration, as an abrasive, etc.
Also called: diatomite (daiˈætəˌmait), kieselguhr
Word origin
[1880–85]This word is first recorded in the period 1880–85. Other words that entered Englishat around the same time include: automatism, impressionism, interface, pari-mutuel, quotation mark
Examples of 'diatomaceous earth' in a sentence
diatomaceous earth
Some gardeners use the white powder diatomaceous earth against slugs.
Times, Sunday Times (2018)
Only attempt to deal with limited infestations yourself, using a product based on diatomaceous earth (10for 400g).
Times, Sunday Times (2009)
Plus, it firms, smoothes and cleanses, thanks to 'wheat amino acids, algae gel and diatomaceous earth compound'.