OED does 'pirot' -- but fails to quote Carnap/Grice

pirot.
[Apparently < French pirot (1611 in Cotgrave: see quot. 1611 at sense 1),
although this is apparently not recorded elsewhere, and is of unknown
origin. Compare PIDDOCK n.]

1. A razor shell.

1611 R. COTGRAVE Dict. French & Eng. Tongues, Pirot, the Pirot, or
Hag-fish; a kind of long shell-fish.

2. A piddock.

1686 R. PLOT Nat. Hist. Staffs. vii. 250 A sort of Solenes (which the
Venetians call Cape longe, and the English Pirot)..a kind of Shell-fish deep
bedded in a solid rock.

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