This is the 6713th most frequent Polish word.
długosz
"Długosz" refers to a type of fern, specifically the Ostrich Fern (*Matteuccia struthiopteris*).
In this sentence, 'długosz' refers to a specific type of plant, a fern, used as a noun to indicate the species.
Długosz jest rodzajem paproci.
Długosz is a type of fern.
Here, 'Długosz' is used as a proper noun, a surname of the Polish historian Jan Długosz.
Jan Długosz był wybitnym polskim kronikarzem.
Jan Długosz was an outstanding Polish chronicler.
In this example, 'długosz' once again indicates the plant type but emphasizes its growth characteristic quality.