睾丸, 精巣
either of the two oval organs that produce sperm in male animals, located in the scrotum behind the penis
:
• The doctor examined the patient's testicles for any abnormalities.
医師は患者の睾丸に異常がないか検査した。
• Injury to the testicles can be very painful.
睾丸の損傷は非常に痛みを伴うことがある。
