jar mill (plural jar mills)
- A small ball mill with a jar-like drum.
2004, American Society for Testing & Materials, Glass - Ceramic Whitewares, →ISBN, page 73:Either a special steel mortar or a special steel jar mill may be used as alternative means of preparing a crushed sample of glass.
2013, F. Singer, Industrial Ceramics, →ISBN, page 671:For laboratory use and for grinding colours and enamels porcelain pot or jar mills are used.
2017, J Gubicza, Defect Structure and Properties of Nanomaterials, →ISBN:The jar mills are low-energy mills, although they can provide higher energy milling if sufficiently large diameter in order of meters and many balls are used.