What is a large blister or skin vesicle filled with fluid called?

The term for a large blister or skin vesicle filled with fluid is "bullae." In medical terminology, bullae are raised lesions on the skin that are larger than 0.5 centimeters in diameter and contain a clear fluid. They can occur as a result of various conditions, including burns, infections, or inflammatory skin diseases. Understanding this term is crucial for healthcare professionals as it helps them accurately describe skin conditions and determine appropriate treatments.

The other options provided refer to different medical terms that do not describe the same condition. For instance, byasma is not a recognized term in medical vocabulary, while botulism refers to a serious illness caused by a toxin affecting the nervous system. Bradycardia relates to a slower than normal heart rate. Each of these terms pertains to different aspects of health and disease, highlighting the importance of precise terminology in medical contexts.