#specific epithet
- Assamicum — A specific epithet used in binomial botanical nomenclature (the masculine/neuter form of the Latin adjective assamicus), indicating the geographical origin or connection of a species or variety to the Indian region of Assam; most commonly encountered in the scientific name of the large-leaf tea plant, Camellia sinensis var. assamica.
- Aster alpinus — The scientific name of the alpine aster, a perennial herbaceous plant endemic to the high mountain regions of Europe (including the Carpathian Mountains), Asia, and North America; it grows on limestone cliffs and alpine meadows, featuring short stems, pubescent leavesarranged in a basal rosette, and large, solitary flower heads with blue-violet rays and a golden-yellow disc.
- Aster brachytrichus — The scientific name of a perennial herbaceous plant species in the Asteraceae family, native to the mountainous regions of Southwest China (Yunnan, Sichuan); it is characterized by erect stems, short and rigid hairs across its entire surface (hence the name), and decorative flower heads featuring long, pale blue or lilac ray florets and a prominent yellow disc.
- Aster canus — The scientific name of the hoary aster, a perennial herbaceous plant in the Asteraceae family, native to Eastern Europe and the Balkans (including the forest-steppe zones of Romania); it is characterized by a grayish, hoary appearance across the entire plant, caused by a dense layer of woolly hairs, and features medium-sized flower heads with lilac rays and a yellow disc.
- Asteroides — A specific epithet used in Latin binomial nomenclature to describe a plant, organism, or anatomical structure that exhibits a shape or appearance resembling a star or the plants of the Aster genus; it is formed by combining the Greek root 'aster' with the suffix of resemblance '-oides'.
- Asterius — A specific epithet or term in scientific Latin (derived from Greek 'asterios' meaning star-like, starry), used in taxonomy to describe animal, insect, or fossil species exhibiting radiate color patterns, star-shaped spots, or a carapace with a glossy, geometric texture.
- Atropos — The name of one of the three Moirai (or Fates) in Greek mythology, the one who cut the thread of mortal life, symbolizing implacable destiny and death; in biology, it is used as a specific epithet in nomenclature (e.g., Acherontia atropos - the death's-head hawkmoth) or as a structural root for naming highly toxic plant genera and substances.
- Avellanarius — Latin term used in modern biological taxonomy as a specific epithet in the scientific name of the hazel dormouse (Muscardinus avellanarius), a small rodent mammal of the gliridae family; the word originates etymologically from the Latin noun 'avellana' (hazelnut), making a direct reference to the animal's preferred habitat and its primary diet consisting of hazelnuts and forest berries. It is used exclusively in academic literature, zoology, ecology, and specialized guides for rigorous species identification.
- Azureum — A term of Latin origin used in international scientific nomenclature (botany, zoology, microbiology) as a specific epithet to designate species of plants, insects, or microorganisms that display a characteristic azure-blue coloration. In a structural sense, the word serves as a morphological indicator in taxonomy for the visual identification of specimens.