from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A floating structure, such as a flatbottom boat, that is used to support a bridge.
- n. A floating structure serving as a dock.
- n. A float on a seaplane.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A flat-bottomed boat used as a support for a temporary bridge.
- n. A floating structure supporting a bridge or dock.
- n. A box used to raise a sunken vessel.
- n. A float of a seaplane.
- n. A card game in which the object is to obtain cards whose value adds up to, or nearly to, 21 but not exceed it.
from the GNU version of the Collaborative International Dictionary of English
- n. A wooden flat-bottomed boat, a metallic cylinder, or a frame covered with canvas, India rubber, etc., forming a portable float, used in building bridges quickly for the passage of troops.
- n. A low, flat vessel, resembling a barge, furnished with cranes, capstans, and other machinery, used in careening ships, raising weights, drawing piles, etc., chiefly in the Mediterranean; a lighter.
from The Century Dictionary and Cyclopedia
- n. In milit engin., a flat-bottomed boat, or any light framework or floating structure, used in the construction of a temporary bridge over a river.
- n. Nautical, a lighter; a low flat vessel resembling a barge, furnished with cranes, capstans, and other machinery, used in careening ships, chiefly in the Mediterranean.
- n. In hydraulic engineering: A water-tight structure or frame placed beneath a submerged vessel and then filled with air to assist in refloating the vessel.
- n. A water-tight structure which is sunk by filling with water and raised by pumping it out, used to close a sluiceway or entrance to a dock. Also spelled ponton.
- n. In anatomy, a loop or knuckle of the small intestine: so called from the way it appears to float in the abdominal cavity. See the quotation under mesentery.
- n. In brewing, one of the cleansing-rounds or cleansing-squares used for clarifying ale.
- n. Same as catamaran, 4.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a float supporting a seaplane
- n. (nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge
French ponton, from Old French, from Latin pontō, pontōn-, floating bridge, from pōns, pont-, bridge.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Old French ponton, from Latin ponto (‘ferryboat’), from pons (‘bridge’). (Wiktionary)
Probably from vingt-un, an obsolete variant of vingt-et-un, from French, literally ‘twenty-one’. (Wiktionary)