anion exchange n.
The process by which an anion in a liquid phase exchanges with another anion previously bound to a solid, positively charged phase.
See ion exchange.
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|