A Kerf.
Perhaps you are looking for "Kerf" - the width of the cut made by a saw groove.
the saw cut space is called a 'kerf'
Cross cut or rip cut depending on which direction you go.
You can get at most eleven pieces if your saw has any width at all. (5.5 * 12 = 66 but then the kerf (the saw cut width) is not taken into account.
Kerf
A rip saw is a saw designed to cut with the grain, it generally has more aggressive teeth. A saw designed to cut across the grain is called a cross cut saw.
Saw dust.
A kerf is the width of the cut made by a saw blade in woodworking. It is used to create precise cuts and allows for the saw blade to move smoothly through the wood without causing damage.
The ideal width of a saw blade for cutting through hardwood is typically between 1/8 inch to 3/4 inch. The specific width will depend on the type and thickness of the hardwood being cut, as well as the desired precision of the cut.
The set on the teeth makes the kerf (width of the cut) slightly wider then the blade so the saw can clear the dust from the cut and the blade won't bind up.
A table saw can efficiently cross-cut long boards by adjusting the fence to the desired width, setting the blade height to the thickness of the board, and using a push stick to guide the board through the saw blade for a straight and precise cut.
A reciprocating saw's blade moves in a back and forward motion. (thus, the Jigsaw ans sabre saw are types of reciprocating saw, but not called such). A circular saw such as the type made famous by Skil has a round blade and revolves to cut.