etch
131freeze-etch|ing — «FREEZ EHCH ihng», noun. a method of preparing specimens for study under an electron microscope by freezing them and then breaking them up along natural planes of weakness to show their internal structure in three dimensions …
132pho|to|etch|ing — «FOH toh EHCH ihng», noun. 1. any process of photoengraving in which the plate is etched, as by acid. 2. a plate or print so produced …
