#scope

• Angioscopy — A minimally invasive medical imaging investigation method consisting of the direct and structural visualization of the interior of blood vessels (lumen and endothelium) using an angioscope introduced via catheterization. This well-defined clinical procedure allows surgeons and interventional cardiologists to inspect in real time the morphology of atheromatous plaques, the presence of microthrombi, or the integrity of intraoperative vascular sutures.
• Anoscope — A tubular, cylindrical, or conical medical instrument, made of metal or sterile plastic material, used in proctology for the direct visualization and endoscopic examination of the mucosa of the anal canal and the lower portion of the rectum. This structural device is often equipped with an integrated lighting system and allows the physician to diagnose fissures, hemorrhoids, polyps, or other local lesions, while also providing access for minor therapeutic procedures or biopsy sampling.
• Antroscope — An endoscopic medical instrument, rigid or flexible, equipped with an optical illumination and lenticular visualization system, used for the direct clinical examination and diagnosis of anatomical cavities, specifically the maxillary sinus (antrum of Highmore); a precision optical device introduced through the nasal meatus to investigate the state of the sinus mucosa.
• Anoscope — A tubular, rigid medical instrument made of metal or sterile plastic, equipped with a local illumination system; it is used in the direct clinical examination of the anal canal and the lower rectum to identify hemorrhoids or fissures.
• Wingspan — The linear distance between the tips of the open wings of a bird or an airplane; (figurative sense) scope, scale, major importance, complexity, or outstanding intellectual capacity of an action, a project, or a remarkable personality.
• Arecibo — A proper geographical name designating a coastal municipality in Puerto Rico, globally famous for its iconic Arecibo Observatory, a massive astronomical structure built inside a natural sinkhole depression. Structurally, the observatory served for decades as a cornerstone in astrophysics, ionospheric research, and SETI programs searching for extraterrestrial intelligence, and was also the origin of the famous 'Arecibo Message' beamed into space in 1974.
• Arthroscope — A high-precision rigid or flexible endoscopic medical device, equipped with a miniature optical lens system, a fiber-optic light source, and a high-performance video camera, designed to be inserted into a joint cavity through a microscopic incision. This surgical instrument allows orthopedic surgeons to directly examine, diagnose, and perform minimally invasive treatment on joint pathologies (such as meniscus or ligament tears), significantly reducing the patient's postoperative recovery time.
• Arthroscope — A rigid or flexible endoscopic instrument equipped with a fiber-optic system and a miniature video camera, introduced through a microscopic incision directly into a joint cavity. This high-tech medical device allows the visualization of all internal anatomical structures on an external monitor at maximum resolution, serving both for diagnostic purposes and as a visual guide during minimally invasive surgeries.
• Arthroscopy — A modern and minimally invasive surgical procedure used for the direct visual examination, diagnosis, and treatment of conditions within a joint, performed by inserting an arthroscope through millimeter-sized incisions. This advanced technique considerably reduces trauma to periarticular soft tissues, limits bleeding risks, and significantly shortens the patient's postoperative functional recovery period compared to classic open surgeries.
• Astrodome — A transparent, hemispherical dome or cupola made of optical glass or durable plexiglass, mounted on the upper fuselage of an aircraft (especially 20th-century bombers and transport planes) or on a terrestrial structure. This structural element allowed the flight navigator to use a sextant or astrocompass to determine the position by observing celestial bodies, while in architecture it designates the rotating dome of a small astronomical observatory.
• Astrophysicist — A scientist, researcher, or highly qualified specialist in the field of astrophysics; an expert who applies the methods, theories, and principles of fundamental physics to investigate the structure, dynamic behavior, life cycles, and radiation of celestial bodies. Their activity includes spectral analysis of light emitted by stars, modeling collisions between black holes, or interpreting global gravitational anomalies.
• Astrophotographic — Belonging to astrophotography, relating to astrophotography; referring to the techniques, equipment, or processes used for photographing celestial bodies and cosmic phenomena. This term also describes optical instruments (such as refractors or telescopes) specifically designed to project a flat and color-corrected image directly onto a digital camera sensor.
• Astrograph — An astronomical refractor or telescope with a wide field of view, specifically designed and optimized for astrophotography, sky mapping, and astrometry. This optical instrument lacks an eyepiece for direct visual observation, instead focusing light directly onto a photographic plate (historically) or a large-scale electronic digital sensor (CCD/CMOS), enabling the precise recording of star and galaxy positions.
• Astrologer — A woman who practices astrology; a female specialist who interprets the positions and movements of celestial bodies (planets, stars, constellations) to construct natal charts and predict their alleged influence on human destiny, personality, and behavior. This activity is based on ancient esoteric belief systems and symbolic geometric calculations, lacking scientific foundation or empirical validation in modern physics.
• Astrologer — A person who practices astrology; a specialist in interpreting the position of planets and stars for the purpose of predicting the future or determining a person's character. In antiquity and the Middle Ages, the role of an astrologer was often merged with that of an astronomer (such as Johannes Kepler), but in the contemporary era, his activity is clearly demarcated from science, being considered a pseudoscience based on mysticism.
• Astrologer — A woman who practices astrology; a female specialist who interprets the positions and movements of planets or stars to create natal charts and predict their alleged influence on human destiny and character. This occupation utilizes esoteric methods based on astronomical symbolism, being completely distinct from modern scientific astronomy.
• Astrological — Belonging to astrology, relating to astrology; based on the principles, symbolic calculations, or interpretations specific to star-reading and horoscope determination. The term describes elements, charts, correlations, or predictions structured around planetary positions and zodiac signs, used to attribute mystical meanings to human destiny, lacking any scientific or empirical foundation in modern astronomy.
• Astrometer — An astronomical measuring instrument used for the precise determination of angular positions, coordinates, and distances between celestial bodies in the night sky. Although historically the term defined filar micrometers or classic meridian circles used in astrometry, it can currently also designate the human specialists operating these complex mapping systems or automated scanning telescopes linked to sensor arrays.
• Astronomical — Belonging to astronomy, relating to astronomy; based on the laws, methods, and principles of studying celestial bodies. In colloquial, journalistic, or economic language, the term is used hyperbolically to describe a huge, exaggerated, substantial figure, sum of money, distance, or proportion that exceeds ordinary limits and recalls the vastness of cosmic dimensions.
• Astronomy — A fundamental and natural science that deals with the study, observation, measurement, and physico-mathematical interpretation of celestial bodies (stars, planets, satellites, comets, asteroids, galaxies), cosmic structures, and the universe as a whole. This discipline investigates the origin, evolution, chemical composition, and motion dynamics of matter and energy in extra-atmospheric space, being one of the oldest branches of human knowledge.