- (sometimes initial capital letter) to test (water, liquid solutions, etc.) for ammonia by means of Nessler's reagent.
Also especially British, ness·ler·ise.
Origin of nesslerize
1870–75; after Julius Nessler (1827–1905), German chemist; see -ize
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018