what does it called which harry potter speaks with moving his magical wands?

Question

harry potter speaks something with moving his magical wand to make a magic. I want to know what does that sentences called whatever he says..

Answer 1

There are many spells used in the harry potter movies and books. You could find a complete list here:

Answer 2

He uses "Spells" which are used differently for different Purposes
Like:
To Cut Something they use "Diffindo"
To push Something They Use "Flipendo"
To Open a locked door or window. they use - Alohomora
There Must be More Than 300 Spells in The HP universe

Answer 3

or an "incantation"