A part of a mold used by pewterers in the formation of their wares.(noun)
The Century Dictionary (Public Domain)
Use "cottle" in a sentence
"Take care with this step, as the pressure of liquid plaster is sometimes surprising, and a lot of work can be lost if all the plaster runs out of the cottle."
"Allow about 4 cm between cottle and largest diameter of the vase."
"FIGURE 6. 5.2-A Universal cottle with clamps made from iron bars."