棕斜蛛咬中毒：由棕斜蛛或裼皮斜蛛叮咬所引起之病态；在叮咬初期疼痛，红斑性水疱，继成坏疽性腐烂；初见于南美，北美亦有少数病例
习惯用语viscerocutaneous loxoscelism
内脏皮肤型棕斜蛛咬中毒：有时为致死性疾患，棕蜘蛛叮咬后，除局部反应外，并有发热及血尿- wasserhelle
- Wassermann-fast
- Wassermann test (reaction)
- waste
- water
- water-borne
- water brash
- Waterhouse-Friderichsen syndrome
- watermelon
- waters
- watershed
- Watkins' operation
- Watson,
- Watson-Crick helix
- Watsonius watsoni
- Watson-Schwartz test
- watt
- wattage
- watt-hour
- wattmeter
- wave
- wavelength
- wax
- waxing
- waxing up