A pustule or vesicle; (in later use) esp. one typical of chickenpox and smallpox. Also: the scar left by such a pustule, a pockmark.

With plural agreement. The red spots of the eruption of an infectious disease (probably scarlet fever or measles). Cf. slightly earlier rossals, n.…

any of the slightly raised, rose-coloured papules that appear on the abdomen and lower chest in typhoid and paratyphoid fever.

Medicine. A well-demarcated, flat or slightly elevated area of abnormal tissue; esp. a large, slightly raised skin lesion.