#structural taxonomy
- Agamids — An archaic plural form or old taxonomic variant used in early Romanian natural history textbooks to denote the agama family (Agamidae) or reptile species structurally related to acrodont lizards.
- Amentiflorous plants — An archaic or niche taxonomic term used to designate plants whose flowers are grouped in catkin-type (ament) inflorescences. This extended structural group is equivalent in modern terminology to amentaceous or amentiferous plants, gathering trees adapted for wind-borne pollination whose reproductive structures lack a developed perianth.
- Androtype — A constitutional pattern, ideal sample, or male reference specimen used in anthropometry and biology to define the standard physical, somatic, and morphological characteristics of males within a specific population or species. In zoological taxonomy, it represents the type specimen used to describe male features.
- Annelid — The feminine singular form of 'anelid' or a designation used for any invertebrate belonging to the phylum Annelida. In its plural form (anelide), it represents the broad taxonomic group gathering segmented worms (oligochaetes, polychaetes, and hirudineans).
- Winged seed variant — An extremely rare popular or regional name assigned to certain small winged insects or plants whose elements (leaves, seeds, stems) are equipped with thin membranes, winglets, or foliaceous expansions that assist in structural wind dispersal. In some local dialects, the term can represent a hypocoristic or pejorative derived form for a small bird or an agitated person who constantly gesticulates.