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Glossary of Aerodynamics Terms
beginning with letter B
Browse the Aerodynamics Glossary
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backwash Tweet Definition of backwash Like Definition of backwash on Facebook
noun ;backwash
  1. (nautical) the backward flow of water from oars or propeller
  2. the similar flow of air from an aircraft engine
  3. the result or consequence of an event; an aftermath
  4. spitting of a liquid back into a bottle from which one is drinking
ballast Tweet Definition of ballast Like Definition of ballast on Facebook
  1. (nautical) heavy, Heavy material that is placed in the hold of a ship (or in the gondola of a balloon), to provide stability.
  2. (figurative) Anything that steady, steadies emotion or the mind.
  3. coarse, Coarse gravel or similar material laid to form a bed for roads or railroads.
  4. (electronics) device used for stabilizing current in an electric circuit ( a tube lamp supply circuit)
  1. To stabilize or load a ship with ballast.
  2. To lay ballast on the bed of a railroad track.
ballonet Tweet Definition of ballonet Like Definition of ballonet on Facebook
  1. one of several small balloons, inside a dirigible, that can be inflated or deflated to control buoyancy during flight
balloon Tweet Definition of balloon Like Definition of balloon on Facebook
  1. An inflatable buoyant object, often (but not necessarily) round and flexible.
  2. Such an object as a child"s toy.
  3. Such an object designed to transport people through the air.
  4. (medicine) A sac inserted into part of the body for therapeutic reasons; such as angioplasty.
  5. A speech bubble.
  1. (transitive) To increase or expand rapidly.
His stomach ballooned from eating such a large meal.
Prices will if we don't act quickly.
bank Tweet Definition of bank Like Definition of bank on Facebook
  1. An institution where one can place and borrow money and take care of financial affairs.
  2. A branch office of such an institution
  3. A safe and guaranteed place of storage for and retrieval of important items or goods.
blood bank
sperm bank
data bank
  1. A row or panel of items stored or grouped together.
a of switches
  1. An edge of river or other watercourse.
  2. (nautical) An elevation, or rising ground, under the sea; a shallow area of shifting sand, gravel, mud, and so forth (for example, a sandbank or mudbank).
  3. An embankment.
  4. (context, aviation) The incline of an aircraft, especially during a turn.
  5. A row of keys on a musical keyboard or the equivalent on a typewriter keyboard.
  1. (context, intransitive, aircraft) To roll or incline laterally in order to turn.
  2. (context, intransitive) To deal with a bank or financial institution.
He banked with Barclays.
  1. (context, transitive) To put into a .
I'm going to the money.
  1. (context, transitive) To cause (an aircraft) to .
  2. (context, transitive) To form into a or heap, to bank up.
  3. (context, transitive) To cover the embers of a fire with ashes in order to retain heat.
barnstorm Tweet Definition of barnstorm Like Definition of barnstorm on Facebook
  1. To travel around the countryside making political speeches etc
  2. To appear at fairs and carnivals in exhibitions of stunt flying, or sporting events
  3. An athletic team that travels from town to town performing in front of primarily small crowds
barrel roll Tweet Definition of barrel roll Like Definition of barrel roll on Facebook
noun (plural: barrel rolls)
  1. An aerobatic flying maneuver in which the pilot causes the airplane to complete one loop in the same time that the airplane completes one roll, creating the appearance that the airplane is riding on the inside of a cylinder.
belly Tweet Definition of belly Like Definition of belly on Facebook
noun (bell, ies)
  1. (colloquial) The abdomen.
verb (bellies, bellying, bellied)
  1. To position one's belly.
biplane Tweet Definition of biplane Like Definition of biplane on Facebook
  1. An airplane that has two pairs of wings, one above the other
black box Tweet Definition of black box Like Definition of black box on Facebook
  1. informal, Informal name for the brightly colored cockpit voice recorders and flight data recorders in an aircraft that aid in determining the cause of an accident.
  2. A theoretical construct or device with known input and output characteristics but unknown method of operation.
blade Tweet Definition of blade Like Definition of blade on Facebook
  1. The sharp-edged or pointed working end of a tool or utensil, e.g., a knife, chisel, or screwdriver.
  2. thin, Thin plate, foil.
  3. The flat or expanded part of a leaf or petal of a plant
  4. Any weapon or tool consisting of a blade (sword, knife, etc.)
  5. Any of the arms of a propeller. E.g., The plane has a four blade propeller.
  6. (context, ultimate frisbee) A throw characterized by a tight parabolic trajectory due to a steep lateral attitude.
  7. (context, rowing) An oar.
  8. (context, sailing) A rudder, daggerboard, or centerboard.
  9. (context, slang, mainly, US) A homosexual, usually male.
  10. (archaeology) A piece of prepared, sharp edged stone, often flint, at least twice as long as it is wide.
verb (blad, ing)
  1. (professional wrestling) To cut oneself intentionally, almost always on the forehead, with a small razor to induce bleeding during a match.
Blimp Tweet Definition of Blimp Like Definition of Blimp on Facebook
  1. A military middle class Englishman intolerant of others" ideas.
blind Tweet Definition of blind Like Definition of blind on Facebook
  1. A covering for a window to keep out light. The covering may be made of cloth or of narrow slats that can block light or allow it to pass.
  2. Any device intended to conceal or hide; as, a duck blind.
  3. (baseball) (slang) An 1800s baseball term meaning no score.
  4. (poker) A forced bet
  5. (poker) A player who is or was forced to make a bet
  1. (transitive) To make temporarily or permanently blind.
The light was so bright that for a moment he was blinded.
Don't wave that pencil in my face - do you want to blind me?
adjective (blinder, blindest)
  1. (notcomparable) Of a person or animal, unable to see.
    • 1883: w:Robert Louis Stevenson, Robert Louis Stevenson, w:Treasure Island, Treasure Island
    • : He was plainly , for he tapped before him with a stick, and wore a great green shade over his eyes and nose...
      1. (comparable) fail, Failing to see, acknowledge, perceive.
      The lovers were to each other"s faults.
      1. (notcomparable) Of a place, having little or no visibility; as, a blind corner.
      2. (notcomparable) close, Closed at one end; having a dead end; as, a blind hole, a blind alley.
      3. (notcomparable) Without opening; as, a blind wall.
  1. In three card brag, without looking at the cards dealt.
blowout Tweet Definition of blowout Like Definition of blowout on Facebook
  1. a sudden puncturing of a pneumatic tyre / tire
  2. a sudden release of oil and gas from a well
  3. a social function, especially one with large quantities of food
  4. (sports slang) A sporting contest that is decidedly one-sided and whose outcome is no longer in doubt. Often occurs when one team is superior to the other.
The game between the two teams was nothing but a .
  1. (Australia) an extreme and unexpected increase in costs, such as in government estimates for a project.
bulkhead Tweet Definition of bulkhead Like Definition of bulkhead on Facebook
  1. (nautical) a vertical partition dividing the hull into separate compartments; often made watertight to prevent excessive flooding if the ship's hull is breach, breached.
  2. A similar partition in an aircraft or spacecraft.
  3. Mechanically, a partition or panel through which connectors pass, or a connector designed to pass through a partition.
bump Tweet Definition of bump Like Definition of bump on Facebook
  1. A light blow or jolting collision.
  2. the sound of such a collision
  3. A protuberance on a level surface.
  4. A swelling on the skin caused by illness or injury.
  5. (Rowing) The point, in a race in which boats are spaced apart at the start, at which a boat begins to overtake the boat ahead.
  6. The swollen abdomen of a pregnant woman
  7. (internet) A post in an Internet forum thread made in order to raise the thread's profile by returning it to the top of the list of active threads.
verb (bumps, bumping, bumped)
  1. Knock or run into with a jolt.
  2. (internet) To post in an Internet forum thread in order to raise the thread's profile by returning it to the top of the list of active threads.

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