There isn't a specific, widely used name for a ray of sun streaming through clouds like a laser. However, depending on the context and the specific visual effect, you could use a few options:

General terms:

* Sunbeam: This is a general term for a ray of sunlight.

* Sunlight ray: This is another general term for a ray of sunlight.

* Crepuscular ray: This term refers to the rays of sunlight that appear to radiate from the sun at sunset or sunrise.

Descriptive terms:

* Laser-like sunbeam: This is a more specific term that emphasizes the laser-like appearance of the ray.

* Beam of sunlight: This is a term that emphasizes the straight, focused nature of the ray.

* Golden ray: This is a more poetic term that highlights the color of the sunlight.

Other possibilities:

* Sun shaft: This term is used to describe a column of sunlight that appears to come from the sun and extend down to the ground.

* God ray: This is a more informal term that is often used in video games and movies to describe a beam of light that appears to emanate from a god-like figure.

Ultimately, the best term to use will depend on the specific context and the effect you are trying to achieve.