#emu

• ABO system — The major human blood group classification system (A, B, AB, and O), genetically determined by the presence or absence of specific antigens (agglutinogens) on the surface of red blood cells and antibodies (agglutinins) in the plasma. In modern medical lexicon, it functions as an invariable proper noun used to identify transfusion compatibility.
• Absolution — The act of forgiving, absolving, or releasing someone from a fault, punishment, or normative obligation; full forgiveness of sins or errors granted by a spiritual or moral authority. In moral philosophy and theology, absolution represents the complete restoration of the subject's ethical dignity, a profound process of reconciliation whereby the conscience is unshackled from the burden of remorse, allowing the individual's reintegration into the community.
• Academus — A legendary hero from ancient Attic mythology, whose primary historical and cultural significance derives from his connection to the origins of Western education. Academos owned an estate and a sacred olive grove (located northwest of Athens) where, according to myth, he helped the Dioscuri rescue Helen. This sacred grove, named 'Hekademeia' or 'Akademeia' in his honor, was later chosen by the philosopher Plato in 387 BC as the site for his famous school, transforming the hero's name into the universal etymological root for 'academy' and 'academic'.
• Academus — The Latinized variant of the name of the ancient Attic hero Academos, primarily used in Western scholarly literature, philosophical treatises written in Latin, and European classicist poetry. The character is the famous mythological owner of the olive grove near Athens, the sacred space within which Plato established his philosophical school. The name represents the direct etymological foundation from which modern neologisms regarding institutions of higher learning and research developed.
• Ratite — A scientific term designating any flightless running bird of the order of ratites (Struthioniformes), anatomically characterized by severely reduced wings and, specifically, a flat sternum completely lacking a keel (carina), a bony structure essential for anchoring the pectoral muscles required for flight. As an evolutionary consequence, these birds (such as the ostrich, emu, cassowary, or kiwi) permanently lost the capacity for flight, developing powerful legs specialized for high-speed running instead.
• Acca Larentia — An archaic deity and mythological figure in ancient Roman religion, revered as a goddess of fertility, the earth, and death, celebrated on December 23 during the Larentalia festival. In founding legends, she is described as the wife of the shepherd Faustulus and the adoptive mother of Romulus and Remus; her nickname 'lupa' (Latin for both she-wolf and prostitute) inspired the myth of the Capitoline Wolf. Modernly, it defines a Roman street known for a political attack during the 'Years of Lead'.
• Aenesidemus — Aenesidemus; a Greek skeptic philosopher of the 1st century BC, born in Knossos (Creta), famous for reviving and structuring Pyrrhonism in Alexandria. He is the author of the lost work 'Pyrrhonian Discourses' and the creator of the ten tropes (modes of argumentation) through which he demonstrated the impossibility of absolute knowledge and the necessity of suspending judgment (epoche).
• Agadir — A major port city and renowned tourist resort in southwestern Morocco, located on the coast of the Atlantic Ocean, at the foot of the Atlas Mountains. Etymologically, the name originates from the Berber language (Tamazight) and means 'fortified granary' or 'citadel', the locality being historically famous for its complete structural reconstruction after the devastating 1960 earthquake.
• Achillides — A rare or archaic patronymic form found in old Romanian translations or classicist poetry, used to designate a descendant or legendary offspring of Achilles (such as his son, Neoptolemus). It can also be used stylistically as an antonomastic epithet to describe a young warrior who inherits the physical qualities, bravery, and fierce spirit of the great Homeric hero.
• Alba Longa — An ancient, legendary city in central Italy, situated in the Latium region, in the Alban Hills, completely destroyed by Rome in the 7th century BC. According to Roman tradition and mythology, it was founded by Ascanius (son of the Trojan hero Aeneas) and was the home city of the twins Romulus and Remus, the founders of Rome.
• Allocheiria — A rare neurological disorder of sensory perception in which a tactile stimulus applied to one side of the body (usually a limb) is erroneously felt or localized by the patient at the symmetrical point on the opposite side. This structural phenomenon occurs most frequently following lesions of the right parietal lobe or in cases of hemispatial neglect syndrome, reflecting a dysfunction in brain somatic map processing.
• Ambrose — A Romanian masculine given name of Greek origin ('Ambrosios'), literally translated as 'immortal' or 'divine' (closely linked to the term 'ambrosia' - the food of the gods). In a religious and hagiographical context, the name refers to Saint Ambrose, Bishop of Milan, one of the most important theologians of the 4th-century Christian Church, renowned for his writings, oratory skills, and liturgical hymns.
• Unmyelinated — Lacking a myelin sheath; a nerve fiber or axon devoid of the protective, insulating structural lipid layer. Amielinic (unmyelinated) fibers (such as type C fibers) are characterized by a significantly slower nerve impulse conduction velocity compared to myelinated ones, playing an essential functional role in transmitting dull pain sensations, temperature, and regulating autonomic nervous system connections.
• Amygdalous compound — A rare, archaic medical and pharmaceutical term structurally utilized to denote a medicinal preparation, oil, ointment, or emulsion derived from almond kernels (especially bitter almonds), or a dense cosmetic substance historically used for skin softening. In a rare adjectival sense, it describes an element with a fatty texture or specific scent directly derived from processing amygdalin compounds.
• Amyostasia — A neurological disorder manifested by constant muscle tremors or motor instability, characterized by the inability to maintain a fixed position or a stable resting state of the muscles. This structural clinical manifestation occurs following lesions of the motor nerve pathways or in degenerative diseases of the central nervous system.
• Amrita — A term of Sanskrit origin (amṛta) utilized in Hinduism, Buddhism, and Sikhism to designate the divine nectar of immortality, the sacred liquor of the gods structurally obtained through the churning of the milk ocean (Samudra Manthan); it represents a conceptual equivalent of ambrosia in Greek mythology, symbolizing absolute purity, spiritual liberation (moksha), and divine bliss achieved through deep meditation.
• Amuliu — A masculine proper name of Latin origin (Amulius), known from Roman mythology as the king of Alba Longa, brother of Numitor, and the one who ordered twins Romulus and Remus to be thrown into the Tiber. In modern onomastics, it is a rare name with strong historical connotations, evoking the founding legends of Ancient Rome and the dynastic structure of the era.
• Genus Anaphalis — A genus of perennial herbaceous plants in the family Asteraceae, subfamily Asteroideae, primarily native to the mountainous and temperate regions of Asia, with a few species distributed in North America. Popularly known as 'pearly everlastings', these plants are characterized by leaves covered with grayish-white silky or woolly hairs and compact inflorescences made of globular capitula with dry, membranous, and persistent involucral bracts, often white, which retain their shape and color long after drying.
• Anaphalis cinnamomea — The official binominal scientific name of a perennial herbaceous plant species in the genus Anaphalis, family Asteraceae, native to the temperate and mountainous regions of Asia (including the Himalayas, China, and Japan). The species is structurally remarkable for the dense hairs on the underside of the leaves and stems that acquire a characteristic cinnamon-brown or yellowish tint at maturity, contrasting with the white or cream involucral bracts of the capitular inflorescences, sometimes used as an ornamental plant or in local traditional medicine.
• Anaphalis margaritacea — The official binominal scientific name of the perennial herbaceous plant species popularly known as 'pearly everlasting', belonging to the Asteraceae family. The species is native to North America and Eastern Asia, widely appreciated for its long-lasting inflorescences made of dense capitula with white, pearly, and dry involucral bracts surrounding the yellow central disc florets. The structure of the stem and narrow leaves is covered with a dense layer of silvery, woolly hairs, providing the plant with drought resistance and a distinct aesthetic appearance.