der Penis
penis
The male sex organ in humans and animals, which serves both reproduction and urination.
Im Biologieunterricht wird die Anatomie des Penis besprochen.
In biology class, the anatomy of the penis is discussed.

penis
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penis
The male sex organ in humans and animals, which serves both reproduction and urination.
Im Biologieunterricht wird die Anatomie des Penis besprochen.
In biology class, the anatomy of the penis is discussed.

'Der Penis' (the penis) is the medical and biological technical term. It is used in formal, scientific, or educational contexts and is considered neutral and not vulgar.
Der Arzt erklärte die Funktion des Penis.
The doctor explained the function of the penis.
Because of its register as a technical term, you mainly hear or read this word in biology class, at the doctor's office, in medical brochures, or in scientific texts.
In der achten Klasse lernten wir die Anatomie des menschlichen Körpers, einschließlich des Penis.
In eighth grade, we learned the anatomy of the human body, including the penis.
As a medical term, 'Penis' is often part of compound words that describe specific diseases, parts, or aids.
Peniskrebs ist eine seltene, aber ernste Erkrankung.
Penile cancer is a rare but serious disease.
tail / dick
'der Schwanz' and 'der Penis' can both refer to a male sex organ. 'Penis' is the neutral, factual word for this, for example at the doctor’s office or in biology class. However, 'Schwanz' first has the normal meaning of the rear body part of animals. When 'Schwanz' means the sex organ, it is vulgar and does not fit polite or factual situations. Learners should therefore be careful: for animals, 'Schwanz' is normal; for the human body, 'Penis' is usually the safe choice.

Im Biologieunterricht erklärt die Lehrerin, welche Funktion der Penis hat.
In biology class, the teacher explains what function the penis has.
Der Hund wedelt mit dem Schwanz, wenn er sich freut.
The dog wags its tail when it is happy.