text: tell the opposite of std? std opposites std is an abbreviation used in several different contexts that stand for different terms. it most commonly means : * sexually transmitted disease (also, sexually transmissible disease)  also: * doctor of sacred theology * salinity temperature depth  * são tomé and príncipe dobra, the iso 4217 code for the currency of são tomé and príncipe  * short term disability  * software test documentation * state transition diagram  * subscriber trunk dialling  * subscriber toll dialling  ...which one of these abbreviations do you want the opposite(s) for ?!