Alternating Top Bevel (ATB)

A set of circular saw teeth where, in an alternating pattern, the Carbide tips of the teeth are ground at an angle. Usually associated with crosscutting blades.

alternating top bevel on carbide tipped saw blade

This small illustration gives us a rough notion of the blade's teeth configuration. (The illustration comes from Oldham's website, which I believe is excellent, certainly worth your time if you're curious about teeth configurations on circular saw blades.)