#hobby

• Aquarist — A person passionate about aquaristics, who engages in the breeding, studying, and collecting of fish, plants, and other aquatic organisms in aquariums; as an adjective, it refers to elements or activities specific to this hobby. This specialist or amateur possesses structural knowledge of water biochemistry, species compatibility, and the ecology of captive miniature ecosystems to ensure fauna survival.
• Female aquarist — The feminine form of the term 'acvariofil'; a female enthusiast of aquaristics, actively involved in setting up tanks and caring for captive underwater ecosystems; as an adjective, it describes a passion or a female community dedicated to aquatic life. She masters complex aquascaping techniques and biological management to maintain the structural balance of the aquarium.
• Fishkeeping — A passion, constant preoccupation, or hobby consisting of breeding, reproducing, and studying fish, plants, and other aquatic organisms in controlled artificial environments; a branch of miniature bio-ecosystems closely related to aquaristics. This structural discipline involves deep knowledge of water chemistry, the biological nitrogen cycle, and the ecological balance required for species survival in captivity.
• Fishkeeping variant — A rare, neologistic, or erroneous phonetic variant occasionally used in hobbyist jargon instead of 'acvariofilie', designating the passion for setting up aquariums, as well as breeding exotic fish or plants in controlled artificial tanks. This structural term symbolically reunites the element 'acva-' (water) with the attraction for captive submerged ecosystems.
• Aero-cartophily — A specialized branch of cartophily that deals with the collection, study, and classification of illustrated postcards depicting airplanes, helicopters, airports, flight scenes, famous pilots, or other aspects related to the history and evolution of aviation.
• Aerophilately — A specialized branch of philately dealing with the study and collection of special postage stamps (airmail stamps), labels, postmarks, and postal documents transmitted via air transport (airplanes, helicopters, zeppelins, or rockets). It tracks the evolution of postal rates and airways as well as aviation history reflected in documents.
• Aerophilatelist — A person or collector specialized in aerophilately; a specialist passionate about gathering, studying, classifying, and evaluating airmail stamps, flight postmarks, and postal documents that were actually transported by air via airplanes, helicopters, or airships.
• Aerophilatelist — The feminine form for the term aerofilatelist; a female collector specialized in aerophilately, dedicated to gathering, researching, and preserving airmail stamps, 'Par Avion' postal envelopes, and historical documents related to the transport of correspondence by air.
• Model aircraft — A small-scale aircraft built as a miniature replica of a real plane or based on an original design, capable or incapable of flight, used for sporting, recreational, educational, or experimental purposes. Flight-capable model aircraft can be radio-controlled, control-line operated, or free-flying, and are built from lightweight materials such as balsa wood, polystyrene, or carbon fiber.
• Aeromodelling — A practical sporting-technical activity or hobby consisting of designing, building, tuning, and flying model aircraft. As an official sporting discipline governed by the World Air Sports Federation (FAI), aeromodelling includes national and international competitions organized across various aircraft classes (free flight, control-line, radio-controlled, or scale replicas).
• Aeromodeller — A person who practices aeromodelling as a hobby, technical sport, or research activity; a specialist or enthusiast who designs, builds, adjusts, and flies scale model aircrafts (airplanes, gliders, helicopters). This activity involves applying advanced knowledge of aerodynamics, precision mechanics, electronics, and using lightweight composite materials to achieve optimal stability and high flight performance.
• Female aeromodeller — A woman who practices aeromodelling; an enthusiast or competitive athlete specialized in assembling, structurally calibrating, and radio-controlling scale model aircraft. Her activity combines the engineering rigor of construction with the fine reflex skills required to pilot the devices during technical demonstrations or specialized championships.
• Boost-glider model — An experimental mockup or small-scale model of a hybrid aerospace vehicle, structurally designed to combine the aerodynamic characteristics of an aircraft (wings, gliding flight) with the reactive propulsion force specific to a rocket. This type of model is used in aeromodelling and rocketmodelling competitions to study dynamic behavior during vertical launch and controlled return phases.
• Amateur (feminine) — A woman who pursues a science, art, sport, or technical activity out of pure passion, as a hobby, without specialized professional training or financial gain. As an adjective, it describes an action performed by a non-specialist or a female showing a strong preference for something.
• Amatofil — A person who demonstrates a strong attraction, preference, or intense passion for amateur activities or, in a rare etymological sense, a lover of pure passion and beauty. As an adjective, it defines a behavioral trait or inclination toward aesthetic and cultural pursuits.
• Amatofila — A woman who demonstrates a strong attraction, preference, or intense passion for amateur or non-professional activities; a hobby lover. As an adjective, it qualifies a feminine noun showing a behavioral trait or structural inclination toward high-quality cultural pursuits.
• Amateur — A person who pursues a science, art, sport, or technical activity out of pure passion, as a hobby, without specialized professional training or financial gain. As an adjective, it describes an action performed by a non-specialist or someone showing a strong preference or desire for a specific thing.
• Amateurism — The condition, state, or character of an activity pursued by an amateur; practicing an art, science, or sport out of passion. In a common pejorative sense, the term denotes a lack of professionalism, superficial execution, dilettantism, or incompetence.
• Amateurish — Characteristic of an amateur; performed or conducted in the manner of a non-specialist, dilettante, or hobbyist, outside a professional framework. In a common pejorative sense, it describes work, action, or an approach characterized by a lack of technical rigor, superficiality, or unprofessionalism.
• Arctophile — A person who has a special passion, deep affection, or collector's interest for teddy bears and similar anthropomorphic plush toys. In a structural and psychological sense, the term describes either a hobby manifested through gathering rare or vintage specimens, or a comforting emotional attachment to these symbolic objects, viewed as sources of safety, mental comfort, and childhood nostalgia.