This is the 7906th most frequent Portuguese word.
rheinberg
"Rheinberg" is not a Portuguese word; it is likely a proper noun or refers to Rheinberg, a town in Germany.
In this sentence, 'rheinberg' denotes a proper noun, specifically the name of a city in Germany.
Rheinberg é também o nome de uma cidade na Alemanha.
Rheinberg is also the name of a city in Germany.
Here, 'rheinberg' refers to a specific technique named 'Rheinberg illumination', a method in microscopy for visualizing specimens.
O Rheinberg é uma técnica utilizada em microscopia.
Rheinberg is a technique used in microscopy.
Here, 'Rheinberg' is associated with filters used in the Rheinberg illumination technique in a science context.