| 释义 |
Definition of round-down in English: round-downnoun ˈraʊndˌdaʊn Nautical 1Shipbuilding. A camber in any of the timbers of a sailing ship, especially in the beams of the deck from one side of the ship to the other. 2A section of the flight deck of an aircraft carrier (originally at the aft, but later also forward), shaped to reduce air turbulence on the deck and facilitate landing.
Origin Early 19th century. From round + down. Compare earlier round-aft, roundup. Definition of round-down in US English: round-downnounˈraʊndˌdaʊn Nautical 1Shipbuilding. A camber in any of the timbers of a sailing ship, especially in the beams of the deck from one side of the ship to the other. 2A section of the flight deck of an aircraft carrier (originally at the aft, but later also forward), shaped to reduce air turbulence on the deck and facilitate landing.
Origin Early 19th century. From round + down. Compare earlier round-aft, roundup. |