A terrier of a wire-haired, short-legged breed.
- ‘She told me how hard it is to get a Sealyham and that it's near impossible to ever get a female.’
- ‘The winner of that event, a Sealyham called Charmin, won the terrier group.’
- ‘He believed a Sealyham and a Scotty could produce the type of dog he wanted.’
Late 19th century: from Sealyham, the name of a village in southwestern Wales, where the dog was first bred.