What does sad stand for?

sad stands for "Supra-Arcade Downflow"

How to abbreviate "Supra-Arcade Downflow"?

"Supra-Arcade Downflow" can be abbreviated as sad

What is the meaning of sad abbreviation?

The meaning of sad abbreviation is "Supra-Arcade Downflow"

What does sad mean?

sad as abbreviation means "Supra-Arcade Downflow"