COFFER-DAM. A coffer-dam consists of two rows of piles, each row boarded strongly inside, and being filled with clay within well rammed, thereby resists outward pressure, and is impenetrable by the surrounding water. (See [Caisson].)
COGGE. An Anglo-Saxon word for a cock-boat or light yawl, being thus mentioned in Morte Arthure—
"Then he covers his cogge, and caches one ankere."
But coggo, as enumerated in an ordinance of parliament (temp. Rich. II.), seems to have been a vessel of burden used to carry troops.
COGGE-WARE. Goods carried in a cogge.
COGGLE, or Cog. A small fishing-boat upon the coasts of Yorkshire, and in the rivers Ouse and Humber. Hence the cogmen, who after shipwreck or losses by sea, wandered about to defraud people by begging and stealing, until they were restrained by proper laws.
COGGS. The same with [coaks] or [dowels] (which see).
COGS of a Wheel; applies to all wheel machinery now used at sea or on shore: thus windlass-cogs, capstan-cogs, &c.
COGUING THE NOSE. Making comfortable over hot negus or grog.
COIGN. See [Quoin].