Yes you're right there is a lot of confusion about this :-) Okay, I'm going to just answer about the noun & use the Oxford Dictionaries definition: "Historically, dice is the plural of die, but in modern standard English dice is both the singular and the plural: throw the dice could mean a reference to either one or more than one dice." https://en.oxforddictionaries.com/definition/dice The important words to note in that definition are 'modern standard English'. I have heard people using 'die' for singular - particularly people who like playing role-playing games. Whether this is because they want to distinguish clearly the number of dice, or simply because it's a case of a group of people using non-standard English within their 'community', I don't know... I have never heard 'dices' used as a plural. Are you sure this is the correct definition? There is a verb 'to dice', which has the 3rd person form is 'dices'. Chris

You will sometimes hear or see die as the singular and dice as the plural, one die, two dice. But more commonly nowadays the usage seems to have evolved so that the old plural, dice, has become the singular with either the regular plural 'dices' or often both singular and plural having the same form 'dice'. In other words you are right to be confused because the contemporary language has not settled on what the new form will be.