Final answer:
A program created for Arduino using its IDE is specifically referred to as a Sketch, highlighting its prototype nature and distinguishing it from general source code.
Step-by-step explanation:
A program written with the IDE for Arduino is called a Sketch. This term is specific to the Arduino platform and refers to the code that is written and uploaded to run on an Arduino microcontroller. A sketch includes both the code written by the user as well as the core libraries and functions that make up the Arduino language. The name is meant to suggest a piece of code that is a work-in-progress, in line with the ethos of making and prototyping that is central to Arduino users.