a person or thing that restrains.
Photography. a chemical added to a developer to retard its action.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use restrainer in a sentence
The development is extremely slow, without any tendency to fog; thus the addition of a restrainer should be avoided.
The non-restrainer is within his right when he practises the system carried to its extremest lengths.Chapters in the History of the Insane in the British Isles | Daniel Hack Tuke
The bromide is a restrainer, and to a certain extent will correct over-exposure.Photography in the Studio and in the Field | Edward M. Estabrooke
The restrainer has been withdrawn, and the beast has stepped forth in the plenitude of his power.The Expositor's Bible: The Book of Revelation | William Milligan
For he was zealous, and yet not wanting in knowledge, the restrainer of zeal.St. Bernard of Clairvaux's Life of St. Malachy of Armagh | H. J. Lawlor
British Dictionary definitions for restrainer
a person who restrains
a chemical, such as potassium bromide, added to a photographic developer in order to reduce the amount of fog on a film and to retard the development
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012