Artificial intelligent assistant

coping-stone

ˈcoping-stone
  [f. coping n.1 + stone.]
  1. One of the stones forming the coping of a wall.

1778 Phil. Trans. LXVIII. 236 Cemented into the copeing stones on the parapet-wall. 1844 Hood Haunted H. i. vii, The time-worn coping-stone had tumbled after! 1885 E. Arnold Secret of Death 4 The monkey-peoples' mild brown eyes Glittered from bough and coping-stone.

  2. fig. = cope-stone.

1860 Farrar Orig. Lang. i. 5 Comparative Grammar has deserved the title of ‘the coping stone of philological inquiries’. 1885 J. Payn Talk of Town II. 150 That put the coping-stone on the young fellow's embarrassment.

Oxford English Dictionary

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