This is the 7830th most frequent Portuguese word.
rb
"RB" is not a standard Portuguese word; it may be an abbreviation or acronym.
Here, 'Rb' is used as a scientific symbol representing a chemical element, Rubidium.
Rb é o símbolo químico para o Rubídio.
Rb is the chemical symbol for Rubidium.
In this case, 'rb' is used as an abbreviation in the context of computing, referring to a basic register.
Nos computadores mais antigos, o rb indicava a presença de um registro básico.
In older computers, rb indicated the presence of a basic register.
Here, 'rb' is used as part of programming syntax, representing a command or an operation in certain programming languages.