OPOSSUMS ARE MARSUPIALS. If you open just about any field guide to North American mammals, the opossum will probably be the very first of the 380 or so mammal species described. That's because opossums are our only marsupial, and marsupials are considered very ancient forms of mammals.
operator - an agent that operates some apparatus or machine; the operator of the switchboard. manipulator. causal agency, causal agent, cause - any entity that produces an effect or is responsible for events or results. company operator - an operator who works for a company. driver - the operator of a motor vehicle.
Define the standard operator as an operator procedure within the class or structure. All operator procedures must be Public Shared. Defining an operator on a class or structure is also called overloading the operator. Example. The following example defines the + operator for a structure called height. The structure uses heights measured in feet and inches. One inch is 2.54 centimeters, and one foot modulo 12 arithmetic.