Virus. Organic poison; the contagion of disease.

Viscera. The contents of the abdomen, thorax, or head.

Visuos. One of the internal organs.

Vital. Pertaining to life.

Vivisection. The dissection of an animal while alive.

Volatile. Capable of easily evaporating.

Vulva. The labia externum.

Whitlow. A felon; an inflammation near the bone at the end of the finger.

Wisdom teeth. The last of the molars to appear.

Wound. A hurt or breach of the skin and flesh of an animal.