'Nun buoy' definitions:

Definition of 'nun buoy'

noun

A buoy resembling a cone [syn: conical buoy, nun, nun buoy]

From: GCIDE

nun \nun\ (n[u^]n), n. [OE. nunne, AS. nunne, fr. L. nonna nun, nonnus monk; cf. Gr. ?, ?; of unknown origin. Cf. Nunnery.] [1913 Webster]
1. A woman devoted to a religious life, who lives in a convent, under the three vows of poverty, chastity, and obedience. [1913 Webster]
They holy time is quiet as a nun Breathless with adoration. --Wordsworth. [1913 Webster]
2. (Zool.) (a) A white variety of domestic pigeons having a veil of feathers covering the head. (b) The smew. (c) The European blue titmouse. [1913 Webster]
Gray nuns (R. C. Ch.), the members of a religious order established in Montreal in 1745, whence branches were introduced into the United States in 1853; -- so called from the color or their robe, and known in religion as Sisters of Charity of Montreal.
Nun buoy. See under Buoy. [1913 Webster]

From: GCIDE

Buoy \Buoy\ (bwoi or boi; 277), n. [D. boei buoy, fetter, fr. OF. boie, buie, chain, fetter, F. bou['e]e a buoy, from L. boia. "Boiae genus vinculorum tam ferreae quam ligneae." --Festus. So called because chained to its place.] (Naut.) A float; esp. a floating object moored to the bottom, to mark a channel or to point out the position of something beneath the water, as an anchor, shoal, rock, etc. [1913 Webster]
Anchor buoy, a buoy attached to, or marking the position of, an anchor.
Bell buoy, a large buoy on which a bell is mounted, to be rung by the motion of the waves.
Breeches buoy. See under Breeches.
Cable buoy, an empty cask employed to buoy up the cable in rocky anchorage.
Can buoy, a hollow buoy made of sheet or boiler iron, usually conical or pear-shaped.
Life buoy, a float intended to support persons who have fallen into the water, until a boat can be dispatched to save them.
Nut buoy or Nun buoy, a buoy large in the middle, and tapering nearly to a point at each end.
To stream the buoy, to let the anchor buoy fall by the ship's side into the water, before letting go the anchor.
Whistling buoy, a buoy fitted with a whistle that is blown by the action of the waves. [1913 Webster]