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engines are also known as horizontally opposed engines, however this is distinct from the less common opposed-piston engine design, whereby each cylinder...

An opposed-piston engine is a piston engine in which each cylinder has a piston at both ends, and no cylinder head. Petrol and diesel opposed-piston engines...

A double tap is a shooting technique where two shots are fired in rapid succession at the same target with the same sight picture (as opposed to the controlled...

chemistry, a double bond is a covalent bond between two atoms involving four bonding electrons as opposed to two in a single bond. Double bonds occur most...

The Double Down is a sandwich offered by Kentucky Fried Chicken (KFC) restaurants. It has two pieces of fried chicken fillet, as opposed to bread, containing...

It is a form of overdubbing; the distinction comes from the doubling of a part, as opposed to recording a different part to go with the first. The effect...

replaced. The double bass bow is strung with either white or black horsehair, or a combination of the two (known as "salt and pepper"), as opposed to the customary...

Double-clutching (also called double de-clutching outside of the United States) is a method of shifting gears used primarily for vehicles with an unsynchronized...

In the field of counterintelligence, a double agent is an employee of a secret intelligence service for one country, whose primary purpose is to spy on...

rodents have a double uterus (uterus duplex). In other animals (e.g. nematodes), the term 'didelphic' refers to a double genital tract, as opposed to monodelphic...

A double-decker bus or double-deck bus is a bus that has two storeys or decks. Double-deckers are primarily for commuter transport, but open-top models...

In jurisprudence, double jeopardy is a procedural defence (primarily in common law jurisdictions) that prevents an accused person from being tried again...

of regular season triple-double leaders showing how the record increased through the years. A list of facts of triple-double achievements. Statistics...

The pincer movement, or double envelopment, is a military maneuver in which forces simultaneously attack both flanks (sides) of an enemy formation. This...

to refer to a specific type of Japanese straight, double-edged sword used in antiquity (as opposed to curved, single-edged swords such as the katana)...

In basketball, an illegal dribble (colloquially called a double dribble or dribbling violation) occurs when a player ends their dribble by catching or...

crossing the line will place a driver in a lane where opposing traffic is coming at the driver. A double yellow line is a painted marking separating two lanes...

The National Association Opposed to Women Suffrage (NAOWS) was founded in the United States by women opposed to the suffrage movement in 1911. It was...

In surface science, a double layer (DL, also called an electrical double layer, EDL) is a structure that appears on the surface of an object when it is...

most double-action guns feature the optional ability to cock the hammer separately, reducing the trigger to perform just one action. This is opposed to...