three-level subroutine

three-level subroutine

[′thrē ¦lev·əl ′səb·rü‚tēn]
(computer science)
A subroutine in which a second subroutine is called, and a third subroutine is called by the second subroutine.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.