This is more of a nitpick than anything, but CC (custom combo) originated in Alpha 2, not Alpha 3’s V-ISM.
Priority: Determines whether an attack will beat, lose, or trade with another attack upon collision.
Trade: Both players get hit with each other’s attacks upon collision.
Hitbox: The area/range of an attack or a character’s body (which is sometimes called “hurtbox”). Example: [media=youtube]daMh2pCo1FI[/media] (blue encompasses the area where the character can get hit and damaged by an attack. Red is for attacks).
Air to Air: An aerial move commonly used to beat the opponent’s aerial moves.
Block String: A series of attacks that force the opponent to stay in blocking position. Used mainly for limiting their options, baiting responses, pushing them to the corner, etc.
I’ve never heard the term “proration.” That’s commonly referred to as damage scaling.