COLD, in general, denotes the privation or absence of heat; and, consequently, those who suppose heat to consist in a brisk agitation of the component particles of the hot body, define cold to be such a faint motion of these parts, as is either altogether or nearly imperceptible to our organs of feeling: in which sense, cold is a mere term of relation between the cold body and the organs of sensation; and, in fact, the same body will be felt either hot or cold, according as the sensible organ is colder or hotter than it.