#ontology definition

• Alpaleologic — Pertaining to or relating to the paleology, geology, or ancient fossil layers and glacial structures specific to alpine-type mountain massifs. This structural term describes early geomorphological phenomena, high-altitude sedimentary deposits, or the evolution of prehistoric fauna adapted to cold mountain climates from previous geological epochs.
• Alpaleologie — A specialized branch of earth sciences dealing with the geological, paleontological, and structural study of high alpine-type mountain massifs during prehistoric epochs. This discipline analyzes stratigraphic evolution, ancient karst topography formation, fossils of altitude-adapted organisms, and glacier dynamics from early geological periods, providing essential data for reconstructing the planetary mountain paleoclimate.
• Ammonite — A fossil marine cephalopod mollusk from the Ammonoidea subclass, characterized by an external, planospiral, and chambered calcareous shell, which lived from the Devonian period until the end of the Cretaceous. The fossils of these organisms are widely used in stratigraphical geology as index fossils for the precise dating of sedimentary rock layers from the Mesozoic era.
• Ammonitids — Scientific name or comprehensive taxonomic classification (Ammonitida) that groups together the orders and families of true ammonites, characterized by shells with highly complex and branched suture lines. These fossil marine cephalopod mollusks dominated the seas during the Jurassic and Cretaceous periods, disappearing completely during the mass extinction at the end of the Mesozoic era.
• Ammonoids — Scientific name or higher taxonomic classification (Ammonoidea) that includes all species of fossil marine cephalopod mollusks related to true ammonites, globally distributed from the Devonian to the Cretaceous. These prehistoric organisms are distinguished by the unique structure of their external, spiraled, and chambered shells, serving as essential index fossils in stratigraphy.
• Ancyloceras — A genus of fossil ammonites from the Early Cretaceous period, characterized by a partially uncoiled or unusually bent shell, often with an initial spiraled portion followed by a straight shaft and a final hook-like bend. It represents a reference organism in biostratigraphy for the precise dating of marine geological strata.
• Anchitherium — Scientific Latin spelling for anchiteriu; an extinct genus of primitive three-toed equids that lived during the Miocene epoch across North America, Europe, and Asia. This small-sized mammal represents a major evolutionary link, bridging the gap between primitive forest browsers and open-steppe equids.
• Antepredicaments — Concepts, preliminary definitions, or fundamental logical rules established as a preamble before the exposition of categories or predicaments proper. In the Aristotelian and scholastic philosophical tradition (referring to Aristotle's treatise 'Categories'), these elements analyze crucial linguistic and ontological distinctions (such as univocal, equivocal, and paronymous terms), providing the structural tools necessary for the correct classification of forms of existence and thought.
• Apatosaurus — A genus of gigantic sauropod dinosaur, a herbivore that lived during the Late Jurassic period in what is now North America. This remarkable prehistoric animal was characterized by an extremely long neck, a long whip-like tail used for defense, and massive pillar-like limbs that supported a structural weight of dozens of tons, historically known also under the popular name of brontosaurus.