#apex

• Acrodromous — Regarding leaves or venation patterns; exhibiting acrodromy, where two or more primary or secondary veins originate from the leaf base and run convergently toward the apex, joining at the tip.
• Acrogenous — Regarding plants or structures; developing, growing, or originating exclusively at the tip, apex, or upper extremity, typical of vascular cryptogams like ferns.
• Eagle — A large diurnal bird of prey belonging to the Accipitridae family, characterized by a powerful beak hooked at the tip, sharp curved talons, and extremely keen vision; also, it represents the heraldic symbol of power and sovereignty found on coats of arms, flags, or coins. This apex predator holds major structural ecological importance in controlling small mammal populations within ecosystems.
• Allosaurus — A genus of large bipedal theropod dinosaur, carnivorous, that lived during the Late Jurassic period (approximately 155 to 145 million years ago), operating as the apex predator in what is now North America (Morrison Formation). It was characterized by a massive skull equipped with dozens of sharp, serrated teeth, short but powerful forelimbs ending in three fingers with large claws, and a long, heavy tail used for balance.
• Antapex — An imaginary point on the celestial sphere, located in the constellation Columba, away from which the solar system moves in its global galactic motion relative to nearby stars. This astronomical structural element is located exactly one hundred and eighty degrees away, being diametrically opposed to the solar apex.
• Apex — The tip, upper extremity, or highest point of an anatomical or organic structure (such as the tip of the heart, lung, or tooth root); in botany, it represents the tip of a stem or root where the growth meristematic tissue is located. In astronomy, it denotes the point on the celestial sphere toward which the solar system is moving in its motion through the galaxy.
• Apexian — Relating to the apex, pertaining to it, or located in the tip zone of a structure; derived from or positioned apically. The term is utilized restrictively in certain scientific translations or academic works as a rarer equivalent for the standard adjective 'apical'.
• Apical periodontitis — An acute or chronic inflammatory process localized at the level of the apex (tip) of a tooth root and the surrounding periapical tissues, usually caused by an untreated bacterial infection of the dental pulp (pulp necrosis). It manifests clinically through sharp pain during mastication or axial percussion.
• Apexocardiogram — A graphic tracing recorded with a special apparatus (apexocardiograph) that registers low-frequency vibrations and mechanical displacements of the chest wall caused by the movements of the cardiac apex (heart tip) during the cardiac cycle. It is a historical non-invasive method for evaluating left ventricular function.
• Apices — The plural form for the masculine noun 'apex' (used alternatively with 'apexuri' in scientific or medical jargon) or the plural form of the anatomical archaism 'apendic'; designates the tips, upper extremities, or terminal points of organic, biological, or dental structures.
• Apiciform — Having the shape of an apex, a tip, or a sharp extremity; presenting a conical or pyramidal structure converging toward an upper terminal point.
• Apico-dental — Pertaining to the tip of the tongue and the upper teeth (in phonetics, describing sounds articulated by resting the tongue tip against the inner surface of the upper incisors); in stomatology and endodontics, the term describes an area, structural relationship, or pathology simultaneously involving the root apex and dental elements.
• Apicolysis — A surgical clinical endodontic procedure or rare terminological variant involving the release, cleaning, or destruction of pathological adhesions or altered tissues around the apex (tip) of a tooth root.
• Apicotomy — A surgical intervention consisting of the sectioning or incision of an apex (tip); in dentistry, it represents the surgical cutting of the root tip of a tooth to eliminate a persistent periapical infection, often used as a partial synonym for root-end resection. In an otorhinolaryngological context, it describes the surgical incision or drainage of the petrous apex of the temporal bone in severe cases of petrositis.