What is the Fish and Game's legal definition of a compound bow?

Idaho Fish and Game does not have a specific definition of a compound bow.  However, on page 76 of the Idaho Big Game Seasons & Rules brochure for 2012 explains what archery equipment would be unlawful to pursue or kill big game with.  I have copied and pasted this section below.   Archery Equipment In any hunt, including general any-weapon seasons and shortrange hunts, it is unlawful to pursue or kill big game animals: • With arrows or bolts having broadheads measuring less than 7/8 inch in width and having a primary cutting edge less than 0.015 inch thick. • With any bow having a peak draw weight of less than 40 pounds up to or at a draw of 28 inches. • With an arrow or bolt wherein the broadhead does not precede shaft and nock. • With any chemicals or explosives attached to the arrow or bolt. • With arrows or bolts having expanding broadheads. • With arrows or bolts having barbed broadheads, which is a broadhead with any portion of which forms an angle less than 90 degrees with the shaft or ferrule. • With any electronic or tritium-powered device attached to an arrow, bolt or bow. Except disabled archery permit holders may use a nonmagnifying sight with battery powered or tritium lighted reticles. • With any bow capable of shooting more than one arrow at a time. • With any compound bow set at more than 85 percent letoff. • With an arrow or bolt, and broadhead with a combined total weight of less than 300 grains. • With an arrow less than 24 inches from broadhead to nock inclusive. • With a bolt (crossbow) less than 12 inches from broadhead to nock inclusive.