wafer
way fer
- n a small adhesive disk of paste; used to seal letters
- n a small thin crisp cake or cookie
- n thin disk of unleavened bread used in a religious service (especially in the celebration of the Eucharist)
- Then the entire wafer is coated with an aluminum conductor, which also must be masked, etched and bathed in acid.
- The wafer dissolves over a period of two weeks and, if successful, destroys any remaining cancer cells in its wake.
- As soon as the wafer has cooled once more, it is covered with a layer of photosensitive material and exposed to ultraviolet light projected through a photographic negative.