Definition of 'hybrid" w.r.t pitching position

[Benchcoach]

Is this any help? NFHS Situations 5-7 regarding hybrid pitching stances.

SITUATION 5: The pitcher places his pivot foot on the pitching plate with the toe of the pivot foot in front of a line through the front edge of the plate and the heel of his pivot foot behind the back edge. His non-pivot foot is in front of the line extending through the front edge of the pitching plate. The pitcher attempted to pick-off the runner at second base. RULING: This is an illegal pitching position. When the pitcher moved in his pick-off attempt, he made an illegal pitch and a balk would be enforced. (6-1-2 Penalty)

SITUATION 6: The pitcher places his entire pivot foot on top of and parallel to the pitching plate. No part of his pivot foot is on or in front of the front edge of the pitching plate. His entire non-pivot foot is in a line with the pivot foot, on top of the pitching plate with no part of the non-pivot on or in front of the line of the front edge of the pitching plate.RULING: While this appears to be an unusual and a non-functional pitching stance, it is a legal wind-up position. (6-1-2)

SITUATION 7: The pitcher places his non-pivot foot on top of the pitching plate at a 45-degree angle with one-third of his pivot foot in front of the front edge of the pitching plate and the heel of his pivot foot behind the back edge of the pitching plate. His non-pivot foot is entirely in front of the front edge of the pitching plate. Without making any other movement, the pitcher places his pivot foot entirely behind the pitching plate. RULING: The pitcher initially assumed an illegal pitching position. Since he made no other movement, he is allowed to step back off of the pitching plate with his pivot foot and correct his illegal position. (6-1-2, 3)