n. A large pot used for processing jars when preserving food, either in a boiling water bath or by capturing steam to elevate the pressure and temperature.
n. Someone who lives off container deposit refunds from recycling.
The Century Dictionary and Cyclopedia
n. One who cans fish, meat, fruit, or other things for preservation.
Word Usage
"Dissolving salt: Finely ground salt such as canner's salt or table salt dissolves much taster than coarsely ground salt (rock salt)."