n.
soft stuffing of cotton or polyester.
Type: 2. Preservation — This form appears to derive from "cotton batting", which is attested in the US since the early 1800s. The phrase itself comes from the process of hitting cotton fibres with a bat to make them fluffy. This term occurs most frequently in Canada (see Chart 1).
See also COD-2, s.v. "batten", which is marked "Cdn", and "cotton batten", which is marked "N Amer".
See also: batten batting
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Chart 1: Internet Domain Search, 12 Feb. 2014