sweatband: a band of material tied around the forehead or wrist to absorb sweat
band: a thin flat strip of flexible material that is worn around the body or one of the limbs (especially to decorate the body)
beta receptor: receptors postulated to exist on nerve cell membranes of the sympathetic nervous system in order to explain the specificity of certain agents that affect only some sympathetic activities (such as vasodilation and increased heart beat)