Artificial intelligent assistant

whelmer

whelmer Archit. Obs.
  [? f. whelm v. + -er1.]
  ? A stone placed horizontally. (But cf. wheeler 10.)

1618 in Willis & Clark Cambridge (1886) I. 207 Doresteds with..whitestone heads with whelmers and kneelers over the same of free stone. 1688 Holme Armoury iii. 472/2 A Wall whose Door head, Cap, or Cover is called a Square, or a Cover of Whelmers and Kneelers.

Oxford English Dictionary

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