NOUN (1)

1. program instructions written as an ASCII text file; must be translated by a compiler or interpreter or assembler into the object code for a particular computer before execution;

The Free On-line Dictionary of Computing (17 December 2009):

source code
source
source language

    (Or "source", or rarely "source
   language") The form in which a computer program is written by
   the programmer.  Source code is written in some formal
   programming language which can be compiled automatically into
   object code or machine code or executed by an
   interpreter.

   (1995-01-05)