noun
weakening pulse; exhausted vein
Medical term for a fading pulse, or mining term for a depleted ore vein. Both uses are technical and rare in everyday conversation.
患者の死脈を確認した医師は、静かに首を振った。
The doctor, having confirmed the patient's weakening pulse, quietly shook his head.
その鉱山の死脈は、もう何年も前に掘り尽くされていた。
The exhausted vein in that mine had been worked out years ago.