#structure

• Azo — Containing the azo functional group, which consists of two nitrogen atoms linked by a double bond (-N=N-), each attached to an organic hydrocarbon radical; utilized as an adjective or combining form to designate a broad class of synthetic dyes and aromatic compounds of major industrial importance.
• Azo derivative — A synthetic organic compound derived from a hydrocarbon by replacing hydrogen atoms with the azo functional group (-N=N-), directly bonded to two aromatic or aliphatic organic radicals; these compounds are intensely colored and form the basis for manufacturing most industrial dyes.
• Hydrazoic — Pertaining to hydrazoic acid or derived from it; a term used to describe hydrazoic acid (HN3), an extremely volatile, toxic, and explosive gaseous compound consisting of a group of three nitrogen atoms bonded to a hydrogen atom, as well as its salts known as azides.
• Azotobacter bacterium — A generic name utilized in technical or regional speech for any bacterium belonging to the Azotobacter genus; an aerobic microorganism capable of non-symbiotic fixation of molecular nitrogen directly from the air within the upper soil layers.
• Azurite — A natural basic copper carbonate mineral with a monoclinic crystal structure, characterized by an intense, glossy, vitreous blue color and a famous chemical instability, often transforming into malachite under the influence of moisture. This structural mineral is found in the oxidation zones of copper ore deposits, historically used as a fine paint pigment and currently as a semi-precious stone for jewelry or decorative objects.
• Pelicans — The unarticulated plural form of the feminine noun 'babiță'; it designates multiple pelicans or, in a regional sense, multiple elderly women or multiple instances of childhood ailments described in folk medicine.
• Bacillus — A rod-shaped, cylindrical bacterium with straight, rounded, or slightly concave ends, belonging in a broad sense to the class Bacilli, comprising numerous pathogenic or saprophytic microorganisms. These biological agents can be aerobic or anaerobic and are responsible for causing severe infectious diseases in human and animal organisms, such as tuberculosis, anthrax, tetanus, or leprosy, while also playing crucial roles in industrial fermentation processes.
• Backshore — The part of the beach lying between the berm crest and the coastline, cliff, or sand dunes, located above the mean high-water line of normal tides. This structural sector is submerged exclusively during exceptional storms or extraordinary spring tides, being characterized by dry sand accumulations and specific salinity-resistant coastal vegetation.
• Bah — A very rare Romanian surname, usually derived from the graphic or phonetic adaptation of foreign names or from an ancient rural onomatopoeic nickname. As an interjection or old slang element, the term expressed disgust, contempt, or the rejection of an idea. In a global cultural context, it represents a common transliteration for external historical figures or toponyms.
• Bainite — A specific microstructure of steels consisting of a fine plate-like aggregate of ferrite and cementite, formed by the isothermal transformation of austenite at intermediate temperatures between pearlite and martensite ranges. This structure provides an outstanding balance of hardness, toughness, and wear resistance.
• Balas ruby — A rare variety of spinel of rose-violet or pale red color, utilized as a gemstone in luxury jewelry. Structurally, this crystal differs from a natural ruby through its chemical composition based on aluminum and magnesium oxide, historically called 'balas ruby' due to the frequent confusion made in antiquity between the two minerals.