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Lexicon: Star Fleet Terminology - A
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Ablative Armor

Hull armor employed for the most recent Starfleet vessels such as the Defiant, Prometheus, and Galaxy Dreadnought classes. Ablative armor is an additional reactive plating imposing a counterforce to incoming weapon fire, by dissipating its energy.
ACBAcronym for Annular Confinement Beam, a spatial matrix generated by the primary energizing coils of a transporter system. The ACB determines the geometry for the subsequent scanning and dematerialization process.
Acronyms A word formed from the initial letters or groups of letters of words in a set phrase or series of words, as Wac from Women's Army Corps, OPEC from Organization of Petroleum Exporting Countries, or loran from long-range navigation.
Airlock Area which can be pressurized and depressurized, to provide controlled access to open space. An airlock consists of at least one chamber with one inner and one outer door. The Cardassian airlocks at Deep Space Nine have two chambers.
Akira ClassStarship class of medium sized, maneuverable and heavily armed vessels used for escort and battle missions, primarily constructed in the mid 24th century. Beside the classic round saucer section, these ships have two catamaran-like sections which two warp nacelles are attached to. There is a big weapons module above the connection of the two secondary hulls, emphasizing the military use of the class. The external navigational deflector, that is connected to the bottom of the primary hull, is another typical feature of Akira class vessels.
Alpha Wave InducersThe Alpha Wave Inducer is a device meant to induce a commatose state without drugs in most humanoids. It is not meant to replace natural sleep, and cannot be used frequently. It is an electronic version of an anesthetic. Subject enters a deep dreamless sleep during which surgical procedures can be carried out without causing pain to the subject.
Alternate Timeline Any timeline which is different from the currently valid timeline, in particular a timeline which does not exist any more because of a time traveler or another method used to alter history. An alternative timeline is equivalent to the "normal" course of time, since only an external observer not affected by timeline changes is able to perceive the difference. The concept is similar to a parallel universe. Parallel timelines depend on each other which is inevitably connected with paradoxes.
Ambassador ClassLarge starship class introduced at the beginning of the 24th century, that has been constructed for almost 50 years with only slight changes in design and technology. Being a successor of the Excelsior class, the Ambassador class is classified as multi-mission explorer. Vessels of this class are used for scientific missions as well as diplomatic missions and battles and therefore have remarkable offensive and defensive capabilities. Its series production being stopped already by 2330, the Ambassador class belongs to the discontinued classes and is now mostly used for diplomatic missions. The former tasks of these vessels are taken on by the more modern and even bigger Galaxy class ships, that were designed to be the successors of this class.
AndroidHumanoid shaped Artificial Life Form, basically consisting of a Positronic or, in most, a Neo-positronic Brain and many micro computer systems, actuators and sensors inside a human-like body. Androids are intentionally designed this way so as to work in the same environment and to perform similar tasks as humans. They are acknowledged as a sentient artificial lifeform in the Federation.
AntigravAnti-gravity units that allow to handle heavy cargo. Antigravs are available as hand-held devices and in form of pallets. Antigravs are probably based on the same principle as the gravity generators on starships. Either antigravs generate a reverse gravity field that compensates for the existing natural or artificial gravity, or they are capable of shielding a volume from gravity
Antigrav ThrustersThrusters utilizing antigravity to ascent a ship from a planetary surface. Intepid class ships are equipped with antigrav thrusters. The landing pylons provide additional stability while being on the surface.
AntimatterComplementary form of matter in which the single particle has the same mass but reversed charge. As the two come together the mutual annihilation of matter and antimatter releases an enormous amount of energy and is employed to power a starship's systems.
Antimatter GeneratorDevice located on deck 42 on a Galaxy-class vessel which serves to generate antimatter for the warp drive in case the ship cannot be resupplied in a refuel facility. In normal operation mode onboard antimatter generation is not efficient, more energy is necessary to produce antimatter than the energy content of the obtained antimatter. The only reason for this energy conversion is that the matter/antimatter reaction provides much more power than a fusion reaction. This power is required for the warp drive, while the other ship systems may alternatively be powered by the impulse (fusion) reactor.
Antiproton A naturally occuring antimatter version of a proton that is capable of penetrating the Romulan Cloaking Device. Also used in Hellfire torpedoes.
ArchAn arch is a holodeck interface system which contains the scenario of the running program.
AssimilationBorg term for forced integration of lifeforms and technology into their Collective. For humanoids, and other species assimilation implies transformation into a drone, completely losing their individuality. Nanoprobes are key components in this process. Technology is assimilated by combining and gradually merging existing Borg and new technology. Assimulation is the only process for technological advancement for the collective. Ii is the method used to determine the defenses of other species They capture a species ship and assimulate the crew, learning as much of that species secrets and adding them to their store house of knowledge. The Borg Collective, however, is helpless against Species 8472 that cannot be assimilated.
Atmospheric SystemPart of the life support systems that provides breathable air and comfortable temperature and humidity on a starship. Class-M atmosphere is the standard setting on Federation starships, implying 26°C temperature, 45% relative humidity and 101kPa air pressure with a composition of 78% nitrogen, 21% oxygen and 1% trace gases. Part of the starship volume can be switched to other environmental conditions. Oxygen is produced by photosynthetic processing of CO2 in the hydroponics lab.
Auto Destruct Extreme measure to prevent a starship from being captured by an enemy, also referred to as self destruct. The auto destruct can be initiated by the captain, acknowledged by voice recognition and personal command code. In most cases it is necessary that the first officer or other senior officers confirm the auto destruct. A silent count-down can be selected in order not to warn enemy forces that are already aboard. Capt. Janeway is the only starship captain who is authorized to destroy her ship all alone without other officers confirming
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