A temporary cope, usually made of sand, plaster of Paris, etc., in which part of a pattern is bedded while the final mould is made of the upper, exposed portion.
Origin
Mid 19th century. From odd + side.
Definition of oddside in US English:
oddside
nounˈɒdsʌɪd
Founding
A temporary cope, usually made of sand, plaster of Paris, etc., in which part of a pattern is bedded while the final mould is made of the upper, exposed portion.