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internegative

alt. A specialized type of negative film stock that is part of the intermediate process that goes from an original negative to a release element (most common in the motion picture film post-production process). The material used is itself the same as in an interpositive. The differences is that an IN has a negative image on it, while an IP has a positive image. n. A specialized type of negative film stock that is part of the intermediate process that goes from an original negative to a release element (most common in the motion picture film post-production process). The material used is itself the same as in an interpositive. The differences is that an IN has a negative image on it, while an IP has a positive image.

Wikipedia
Internegative

An internegative is a motion picture film duplicate. It is the color counterpart to an interpositive, in which a low-contrast color image is used as the positive between an original camera negative and a duplicate negative.

After a film is shot, the original negatives—taken directly from the camera equipment—are edited into correct sequence and printed onto fresh stock as a cohesive film, creating an interpositive print used for color timing. From the interpositive, answer prints, which include the color-corrected imagery and a properly synced sound track, are made. Once approved by the studio, the final answer print is made into an internegative used for striking copies that will be delivered to theaters for viewing.