childdirectory

2. A directory that is one level below another directory in a computer's file system.

The program scans each childdirectory for configuration files.

3. In computing, a folder whose location is defined relative to a parent folder.

Moving the parent folder also moves every childdirectory inside it.

4. A subordinate listing or index contained within a larger one.

Each chapter has a childdirectory of its own references.