This is the 7227th most frequent Catalan word.
alopècia
Alopecia: Hair loss.
Here, 'alopècia' is used as the subject and refers to the medical term for hair loss.
L'alopècia és una condició que afecta la caiguda dels cabells.
Alopecia is a condition that affects hair loss.
In this sentence, 'alopècia' is within a prepositional phrase ('sobre les causes de') and denotes the topic of the discussion, linking to the causes of the condition.
Vaig llegir un article interessant sobre les causes de l'alopècia.
I read an interesting article about the causes of alopecia.
Here, 'alopècia' is part of the compound noun phrase 'tractaments per a l'alopècia' and indicates the specific condition being targeted by treatments.