Distilling material.
Distilling material. Any fermented or other alcoholic substance capable of, or intended for use in, the original distillation or other original processing of spirits.
Source
27 CFR § 19.1
Scoping language
As used in this part, the following terms shall have the meanings indicated unless either the context in which they are used requires a different meaning, or a different definition is prescribed for a particular subpart, section, or portion of this part: