What is the full form of src tag in html? Why its stand for?

Full form of src.
SRC- It stand for sorce code of file.

What stand for src?
Src is an attribute specifies the URL of the image. Note: When a web page loads; it is the browser, at that moment, that gets the image from a web server and inserts it into the page.
Example-<img src="smiley.gif" alt="Smiley face">