#catalog

• Alcor — The proper name of a fourth-magnitude star in the constellation Ursa Major (80 Ursae Majoris), located very close to the brighter star Mizar, with which it forms a well-known visual double star pair. Historically, the ability to visually distinguish these two stars with the naked eye was utilized as a classic test for visual acuity across various cultures.
• Alphabetical — Belonging to the alphabet, relating to the alphabet; organized, structured, or arranged in the traditional and fixed order of the letters of a writing system. In data management and archiving, the term describes a fundamental classification criterion used for the rapid indexing of names, documents, or terms within a catalog, registry, or digital database.
• Almagest — A spelling variant used for 'Almagest', the famous mathematical and astronomical treatise written in the 2nd century AD by Claudius Ptolemy in Alexandria. The work represents the ultimate synthesis of ancient Greek astronomy, proposing the geocentric model of the Universe (where the Earth sits unmovable at the center, surrounded by planetary and stellar spheres) that dominated European and Islamic scientific thought for over fourteen centuries until the Copernican revolution.
• Ampelographer — The feminine form of ampelograf; a woman or female specialist dealing with the study, description, classification, and cataloging of grapevine varieties and species, operating both through classical morphological field analysis and advanced genetic testing.
• Ampelography — A specialized botanical and agronomic discipline dealing with the scientific study, detailed description, classification, and identification of grapevine species, varieties, and clones (genus Vitis). This science analyzes both outer morphological traits (leaves, shoots, bunches) and modern genetic profiles, playing a crucial role in preserving viticultural heritage.
• Aotus gracillima — A partial scientific name or cataloged variant (often an abbreviation for an application form, subspecies, or 'apud' publication) referring to the botanical species Aotus gracillima, a shrub endemic to Western Australia. This slender, graceful plant belongs to the Fabaceae family and is characterized by delicate branches and dense inflorescences specific to heathland vegetation.
• Argelander — The surname of the celebrated German astronomer Friedrich Wilhelm Argelander (1799–1875), globally renowned for his fundamental contributions to observational astrophysics and stellar cartography. He coordinated the creation of the 'Bonner Durchmusterung' catalog (1859-1862), a reference structural work recording the position and magnitude of over 324,000 northern hemisphere stars, revolutionizing the study of variable stars and setting modern standards for astronomical photometry.
• Archivist — A woman specialized in archival science, responsible for managing, structuring, appraising, preserving, and restoring documents of historical, legal, or administrative value. She applies strict scientific methodologies for organizing archival funds, digitizing legacy records, and facilitating regulated access to information of public or private interest.
• Peerage book — A historical work, official catalog, genealogical register, or record book in which the names, titles, ranks, family trees, and coats of arms of boyar or noble families from a country or region (such as Byzantium, Moldavia, or Wallachia) were systematically recorded. This structural document served as legal proof of ancient lineage privileges and the lawful succession of dignities.
• Archondology — An auxiliary discipline of history dealing with the systematic study of noble titles, boyar ranks, and administrative dignities in a state; an official work, catalog, or register containing chronological lists of boyars and the offices they held.
• Peerage book — A graphic and phonetic variant of the term 'arhondologhie'; a historical work, official genealogical register, catalog, or record book in which the names, titles, family trees, administrative ranks, and heraldic coats of arms of boyar or noble families from a country or region (such as Byzantium or the Romanian Principalities) were systematically recorded. This structural document constituted essential legal proof of ancient lineage privileges and the legitimacy of the succession of dignities.
• Nobility ledger — A neuter form, derived or used regionally, to denote the physical record book, tome, manuscript volume, or official ledger containing the nobility register (the genealogical and heraldic records of the aristocracy). It represents the structural archival object itself, the boyar catalog where court scribes entered the names of great dignitaries and the feudal privileges granted by the ruling prince.
• Armorial — A collection, repertory, dictionary, or official catalog containing detailed descriptions, graphic representations, and coats of arms of princely dynasties, noble families, cities, or states. As an adjective, it refers to everything pertaining to heraldry or blazons.
• Arp — A German surname, famous in art history due to Jean Arp (Hans Arp), a French-German sculptor, painter, and poet, co-founder of the Dada movement in Zürich in 1916. In astronomy, it refers to Halton Arp and his 'Atlas of Peculiar Galaxies'.
• Astrography — A descriptive branch of practical astronomy or an archaic terminological variant for astrophotography, having as its object the description, mapping, and cataloging of celestial bodies through images obtained using an astrograph. In a historical sense, it represents the technique of printing and faithfully reproducing star charts or photographic plates based on silver emulsion, used intensively in major international sky inventory projects of the 19th and early 20th centuries.
• Climbing asystasia — A climbing plant species in the genus Asystasia, family Acanthaceae, native particularly to the forested areas and tropical regions of West Africa. It is distinguished by its long, flexible shoots that lean on surrounding vegetation to reach the light, having glossy leaves and compact terminal inflorescences with tubular flowers, often white or cream, adapted for pollination by large insects in the forest canopy.