treelist

plural treelists

1. computingA user interface control that displays a list of items in an expandable hierarchy.

   The ILDASM main window displays a treelist of the assembly, like this: […]

   2005, Andrew Whitechapel, Microsoft .NET Development for Microsoft Office, page 60

   1 more example

   If you recall, back in Chapter 2, we created a Hero Slider template that had a single field called Hero Images. It was a treelist with a data source pointing directly at the Media Library.

   2016, Phil Wicklund, Jason Wilkerson, Professional Sitecore 8 Development

2. computerA list of trees (the data structure).