Why is it die Osteoporose?

Osteoporose ends in -ose, and nouns ending in -ose are feminine: in a German dictionary, 97% of them take die.

All nouns ending in -ose
Sense 1
die

Meaning

[1] Medicine: Salicous bone loss

[1] Medizin: krankhafter Knochenschwund

Examples

[1] In Germany, almost eight million people suffer from osteoporosis

[1] In Deutschland leiden fast acht Millionen Menschen an Osteoporose.

Declension

1 Singular Plural
Nominativ die Osteoporose die Osteoporosen
Genitiv der Osteoporose der Osteoporosen
Dativ der Osteoporose den Osteoporosen
Akkusativ die Osteoporose die Osteoporosen

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary