#instrument

• Auxometer — A special optical instrument or apparatus used to determine and measure the magnifying power of a lens system, microscope, or telescope; a precision device engineered to measure the exit pupil diameter or the ratio between image size and actual object size.
• Axometer — An apparatus, measuring instrument, or precision optical device utilized to determine the exact localization, geometric orientation, and alignment of the optical or geometric axes of lenses (especially cylindrical or toric lenses designed for astigmatism correction). This structural calibration apparatus is widely used in medical optics workshops and engineering laboratories to guarantee a delicate mounting and perfect centering of transparent components.
• Axonometru — A traditional drawing instrument, template, or specially graduated ruler used in classical drafting boards to precisely trace axonometric axes and rapidly calculate scale reductions specific to isometric or dimetric projections. In the modern digital environment, the term can describe a software tool integrated into CAD programs that automatically generates guided geometric grids on three-dimensional axes.
• Azotometer — A laboratory apparatus used for the quantitative determination of the volume of nitrogen released from a chemical reaction, or for measuring the concentration of nitrogenous compounds within a complex substance (such as soil or fertilizers); it typically operates on eudiometric or volumetric principles.
• Azotometer — A laboratory apparatus or precision instrument used for the quantitative determination of the volume of nitrogen released during a chemical reaction or organic decomposition process. This structural device, typically made of borosilicate glass and equipped with a graduated scale, is essential in volumetric elemental analyses for measuring the purity of gaseous compounds.
• AZP — A technical acronym used to designate various structural concepts depending on the field, such as 'Low-Noise Power Supply' in electronics, 'Primary Flight Instrumentation' in aviation, or specific biochemical indicators in medical laboratories.
• Baglama — An international proper non-adapted name for a family of long-necked stringed musical instruments with a pear-shaped body, highly popular in Turkish, Greek, and Balkan traditional music, often identified with the saz.
• Bayan — A pneumatic musical instrument with keys or buttons, representing a perfected Russian variant of the chromatic button accordion, widely used in Eastern European folk music and complex classical compositions. It differs from the standard accordion by its internal reed structure and deeper timbre.
• Balafon — A traditional percussion musical instrument from West Africa, similar to a xylophone, consisting of a wooden frame on which rosewood keys tuned to different pitches are mounted. Structurally, the resonance of the sounds is amplified by dried gourds (calabashes) suspended underneath, empirically fixed with small holes covered by thin membranes to produce a characteristic buzz.
• Balalaika — A traditional Russian stringed musical instrument, characterized by a triangular resonant body, a long fretted neck, and traditionally three strings typically tuned to specific pitches. This instrument is an integral part of Eastern European folklore, utilized both in folk music and large philharmonic orchestras due to its diverse sizes, ranging from piccolo to contrabass variations.