subsubroutine

noun

subsubroutine

noun

Etymology From sub- + subroutine.

1

Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences Rare A subroutine called from another subroutine.

Some programming languages even permit a subroutine to contain itself as a subsubroutine; a brain-twisting arrangement.1962, Robert Mills Gagné, Psychological principles in system development:
...hierarchies of subroutines and subsubroutines were used by the programmers to simplify their own organization, introducing a series of levels of control...1965, Robert Engel Machol, Wilson P Tanner, Samuel N Alexander, System engineering handbook:

1 more example

The goal stack mechanism makes it simple to represent hierarchical procedures, where routines call subroutines, which in turn call subsubroutines...1990, Kurt VanLehn, Mind bugs: the origins of procedural misconceptions:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.