#annual

• Adonis annua — The scientific name of the autumn pheasant's eye, an annual herbaceous plant in the Ranunculaceae family, native to North Africa, Europe, and Western Asia. The plant reaches heights of up to 50 cm, featuring finely divided leaves and solitary, intense blood-red flowers with a black center, often found as a weed in agricultural crops or cultivated for ornamental purposes.
• Ageratum houstonianum — A species of annual herbaceous plant in the genus Ageratum, native to Central America and Mexico, widely cultivated globally as an ornamental border plant. It is noted for its compact mounds and dense capituliform inflorescences, with the flower heads resembling blue, lavender, pink, or white floss-like tufts, highly valued in urban landscape design.
• Corncockle — The scientific name (in Latin) for a genus of annual herbaceous plants in the pink family (Caryophyllaceae), whose best-known species is the common corncockle (Agrostemma githago). These plants feature erect, hairy stalks and large, solitary, pinkish-purple flowers; they are historically known as noxious weeds within cereal crops, producing seeds that are toxic due to a high saponin content.
• Aira — A taxonomic genus of annual herbaceous plants within the Poaceae (Gramineae) family, structurally characterized by slender, thin stems and delicate inflorescences in the form of branched panicles, being adapted to dry, sandy, or siliceous soils. Natively distributed throughout the temperate regions of Eurasia and North Africa, these small-sized grasses hold special ecological importance in fixing fragile soils and as indicators of substrate acidity, with some species used in decorative dried flower arrangements due to their fine and persistent appearance.
• Almanac — An annual encyclopedic publication, typically illustrated, containing a detailed calendar, astronomical data (sunrise and sunset times, moon phases, eclipses), meteorological tables, as well as a variety of literary, scientific, historical articles, anecdotes, and practical advice for daily life. In cultural history, it represents one of the oldest and most widespread forms of popular literature.
• Almanac — The current and widely used form in the Romanian language for 'almanac'; an annual periodic publication, encyclopedic and illustrated, which gathers a detailed calendar, astronomical data, weather forecasts, literary articles, historical notes, anecdotes, and practical advice from various fields, aimed at educating and entertaining the general public.
• Anacyclus radiatus — A species of annual herbaceous plants in the genus Anacyclus, family Asteraceae, natively distributed in the Mediterranean basin, especially in sunny coastal regions and disturbed lands. Structurally characterized by erect, branched stems, divided leaves, and capitulum inflorescences with central tubular florets and peripheral ray florets of an intense yellow or yellowish-white color, this plant is studied in systematic botany for its regional morphological variations.
• Anagallis — An historical genus of annual or perennial herbaceous plants in the family Primulaceae (currently mostly merged into the genus Lysimachia), distributed globally across temperate and subtropical regions. These small-sized plants are structurally recognized by their prostrate or ascending stems, opposite leaves, and solitary axillary flowers with bright shades of red, blue, or pink, utilized both in folk medicine due to their saponin content and as ornamental groundcovers.
• Anagallis arvensis — The scientific name of the scarlet pimpernel (currently classified as Lysimachia arvensis), an annual herbaceous plant in the family Primulaceae, widespread as a weed in crops, stubble fields, roadsides, and ruderal places. The plant is structurally characterized by four-angled prostrate stems, ovate sessile leaves, and small, solitary flowers of a bright scarlet-red (or blue, in the case of the foemina form), which possess the unique property of closing during cloudy weather or high humidity, acting as a natural barometer.
• Annals — An historical writing in which events are structurally recorded year by year, in strict chronological order, without a deep critical or philosophical analysis of causes; a yearly historical chronicle. In a modern sense, the term designates the title of certain scientific or academic periodical publications, edited by universities and learned societies to present annual research.
• Androsace maxima — A species of annual herbaceous plant in the family Primulaceae, widespread across temperate regions of Eurasia. Unlike most alpine species of the genus, it develops in lowland habitats and is structurally characterized by a basal rosette and umbels surrounded by an involucre of large green bracts.
• Anogramma — A genus of small, terrestrial ferns in the Pteridaceae family, characterized by finely dissected fronds and an annual or ephemeral lifecycle unusual for pteridophytes. The best-known species is Anogramma leptophylla, a unique structural plant that survives from year to year primarily as a perennial tuberous gametophyte, colonizing damp, shaded, rocky soils in Mediterranean and temperate climates.
• Anogramma leptophylla — A unique species of small fern in the Pteridaceae family, remarkable for its annual or ephemeral life cycle, an atypical phenomenon among pteridophytes. The plant possesses thin, delicate, translucent fronds, but its ultimate structural feature is that the sporophyte regularly dies off during the dry season, survival from year to year being secured by a perennial tuberous gametophyte colonizing shaded rocky niches in Mediterranean and temperate zones.
• Annual — Occurring, celebrated, calculated, or appearing once a year; lasting for an entire year or repeating with regularity every twelve months, serving as a standard chronological indicator in economics, statistics, and social life.
• Annual — The feminine form of the adjective annual; in botany, it designates a plant whose biological cycle (germination, flowering, fruiting, and dying) is completed within a single growing season of one year.
• Annuality — A fundamental budgetary and legal principle according to which public revenues and expenditures, administrative acts, or financial contracts are authorized, executed, and evaluated for a strict period of one year; a sum of money paid periodically, at one-year intervals, to settle a debt or under an annuity contract.
• Annualized — Converted, recalculated, or expressed as a rate, yield, or value corresponding to a full year; a mathematical process by which an indicator obtained over a shorter period is projected to a twelve-month level.
• Yearbook — A periodic publication that appears once a year, containing a compendium of informative, statistical, scientific, administrative, or cultural data regarding the activity of an institution, a field of work, or a community over the course of the preceding twelve months.
• Yearbook — An older, etymological, or archaic linguistic variant of the word 'anuar'; a volume printed with annual regularity serving as a public registry, informative guide, or official administrative and cultural record.
• Annual tribute — An annual tax, tribute, or levy paid in the past by subjects to the ruler or boyars in the Romanian principalities; a periodic financial obligation established over an entire year; (adjective) that is paid or executed once a year, according to old administrative customs.