noun
procedure entry point
Computing term for the starting point or entry of a procedure, function, or subroutine.
このプログラムでは、手続きの入口で引数のチェックを行う。
In this program, argument checking is performed at the procedure entry point.
Compound of 手続き (procedure) + の (possessive particle) + 入口 (entrance). The exact derivation is uncertain; it is a technical computing term.