#meter
- Absorptiometer — A laboratory apparatus used to measure the solubility of gases in liquids or the intensity of radiation absorption by a substance. In epistemology and the philosophy of science, the term is used metaphorically to denote a critical criterion or a hypothetical analytical tool whereby reason evaluates the degree of permeability and assimilation of new ideas inside a rigid doctrine.
- Actinometer — A structural meteorological and physical instrument utilized for measuring the intensity of radiant energy, specifically direct solar radiation. The device operates based on the absorption of rays by an ideal black body, converting luminous energy into heat, which is subsequently determined via thermoelectric or bimetallic methods, or by directly evaluating light-triggered photochemical reactions over a fixed time interval.
- Aquarist — A person specialized in designing, setting up, and maintaining public or private aquariums; a specialist in studying and managing captive-bred aquatic organisms; as an adjective, it describes a style, guide, or activity related to managing submerged biotopes. This specialist combines technical fluid engineering skills with structural biological concepts to maintain optimal life parameters.
- Female aquarist — The feminine form of the term 'acvarist'; a female specialist or passionate amateur engaged in designing, setting up, stocking, and maintaining aquariums; as an adjective, it describes a feminine activity or approach related to managing submerged biotopes. She combines complex concepts of hydrobiology, chemistry, and structural design (aquascaping) to ensure a stable ecological balance in tanks.
- Adaptometer — A laboratory apparatus used in ophthalmology and physiology to measure the speed and capacity of the eye to adapt to darkness or sudden variations in light intensity. The device projects precisely controlled light stimuli, enabling the determination of the retinal adaptation curve and the diagnosis of night blindness or other photoreceptor cell dysfunctions.
- Admittance meter — An electronic measuring instrument used for the direct or indirect determination of the electrical admittance of a circuit, device, or semiconductor material; a laboratory tool structurally designed to evaluate both the active component (conductance) and the reactive component (susceptance) under high-frequency alternating current conditions.
- Airborne magnetometer — A high-precision geophysical apparatus mounted on board an aircraft or towed behind it in an aerodynamic pod, used for the continuous measurement and recording of the Earth's magnetic field intensity during flight. This instrument eliminates the magnetic interference of the fuselage and enables the remote detection of anomalies caused by geological structures or mineral deposits.
- Aerometer — A physical instrument or laboratory apparatus used to measure the density, specific weight, or refractive index of air and other gases; a specialized hydrometer designed for compressible fluids, often operating based on hydrostatic buoyancy laws or by determining the mass of a fixed volume of gas.
- Aerotonometer — A laboratory apparatus or precision technical device used to measure the partial pressure or tension of gases dissolved in a liquid (such as blood) by means of hydro-gaseous equilibration. This structural instrument consists of sealed analysis chambers and fine barometric sensors, being essential in respiratory physiology research.
- Aksak rhythm — An ethnomusicological term of Turkish origin (meaning 'limping') structurally utilized to define a special class of asymmetrical (divisional) musical rhythms, characterized by the unequal alternation of binary and ternary beats (for instance, 5/8, 7/8, 9/8, or 11/8 meters); as an adjective, it describes a traditional dance, folk melody, or rhythmic structure featuring this specific, alternating pulsation. This complex metric system forms the foundation of musical folklore in the Balkan Peninsula, Turkey, and the Near East, being theorized in Romania under the name of asymmetrical rhythm or rhythmaksak.
- Albedometer — A precision meteorological instrument consisting of two coupled pyranometers (one facing upward and one downward), used for the direct measurement of a surface's albedo by simultaneously determining global solar radiation and that reflected by the ground.
- Albuminometer — A laboratory apparatus, typically in the form of a graduated glass tube (such as the Esbach type), used for the quantitative measurement of albumin dissolved in an organic fluid by evaluating the volume of precipitate formed.
- Alkalimeter — An apparatus or laboratory instrument utilized in volumetric chemical analyses to measure the amount or concentration of free bases (alkali) in a liquid mixture. Historically, the term referred to special graduated glass vessels (early burettes), while in a modern context, it can describe automatic titration modules configured for basic determinations.
- Alcmanian — Pertaining to or characteristic of the Greek poet Alcman or the metrical structure utilized by him. In ancient and classical prosody, the term describes a type of verse (the alcmanian verse) consisting of a dactylic tetrameter catalectic, frequently utilized in choral compositions of archaic Greece.
- Alcoholometry — A technical method and set of operations used to determine the concentration of ethyl alcohol in a hydroalcoholic mixture or a beverage. The process is based on measuring liquid density using an alcoholmeter or through precision refractometric and pycnometric methods, being essential in industrial quality control and custom duties.
- Alcoholmeter — A metrological instrument used to determine the concentration of ethyl alcohol in a hydroalcoholic solution or a spirituous beverage. It usually functions on the hydrometer principle, measuring the specific density of the liquid, which varies according to the amount of ethanol present, being graduated directly in percentages of volume (alcohol proof or ABV).
- Alcoholmeter — A simplified form or spelling variant for alcoholmeter or alcoholimeter; a graduated instrument used to measure the density of water and ethyl alcohol mixtures, indicating directly the volumetric concentration of ethanol (alcohol proof or ABV). It is widely used in industrial and artisanal spirits production to monitor distillation processes.
- Aleurometer — A laboratory apparatus used in agronomy and the baking industry to measure the quality of gluten in flour and determine its capacity to rise and expand during baking. The device evaluates the viscoelastic properties of dough under high temperatures, providing essential technological indices for the qualitative classification of grain batches.
- Bore — The internal diameter of an engine cylinder, a pipe, or any tubular part machined by turning or drilling; by extension, the internal cylindrical cavity itself in which a piston or shaft moves. This geometric parameter is fundamental in determining the displacement, compression ratio, and overall performance of internal combustion engines or hydraulic systems.
- Algometry — A clinical method, diagnostic technique, or laboratory procedure used for the quantitative measurement and precise determination of an individual's pain sensitivity threshold. Performed using an algometer that applies calibrated stimuli, it enables the objective evaluation of nociception.