Which term describes a small raised red lesion less than 0.5 centimeter in diameter?

The term that describes a small raised red lesion less than 0.5 centimeter in diameter is "papule." Papules are typically solid, elevated lesions that can vary in color and texture, often associated with conditions like acne, eczema, or insect bites. They are an important feature in dermatological examinations for diagnosing various skin conditions.