/ˈtɛtər/; /ˈtɛtər/; /ˈtɛtər/ (nonstandard)

Definitions

1. noun

An archaic term for a pustule, especially one of the blisters caused by the itch; a pustular skin eruption, such as a vesicle, papule, or pustule, especially in the context of the itch.

“The doctor examined the patient’s tetter and prescribed a topical cream to alleviate the symptoms.”