What is the correct name for this lab technique in crystallization? Take a glass rod and rub vigorously the wall of the flask, the substance will crystallize out of the solution.

Take a fire polished stirring rod and etch (scratch) the glass of your beaker. The small pieces of glass that are etched off of the beaker serve as nuclei for crystal formation

But reaching back to my halcyon years of organic synthesis and crystallization, recalling vivid memories of scratching the sides of Erlenmeyer flasks with a glass rod to induce crystallization

It's a common lab technique. But does it have a name?
I think the most specific you can get on this phenomenon is nucleation , specifically heterogenous nucleation / surface nucleation.

The rough surface formed creates scope for nucleation to occur, and  this creates the crystals.

I don't think there is a specific name for this technique as a lab tenchique .