Glossary A

Aquatic life zone is the marine and freshwater portions of the biosphere.

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An aqueduct is a pipe, conduit, or channel designed to transport water from a remote source, usually by gravity.

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An Aqueous is something made up of water.

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"Aqueous" is in the HS Code "3212"

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An Aqueous Solubility is the maximum Concentration of a chemical that will dissolve in pure water at a reference temperature.

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An Aquifer is an underground geological formation, or group of formations, containing water. They are sources of groundwater for wells and springs.

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An Aquifer Test is a test to determine hydraulic properties of an aquifer.

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An Aquitard is a geological formation that may contain groundwater but is not capable of transmitting significant quantities of it under normal hydraulic gradients.

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An Arable land is Land that can be cultivated to grow crops.

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Deutsch: Arachniden / Español: arácnido / Português: aracnídeo / Français: arachnide / Italiano: aracnide

Arachnid refers to a class of joint-legged invertebrate animals in the subphylum Chelicerata. Arachnids include spiders, scorpions, ticks, and mites, among others. They are characterized by having eight legs and a body divided into two segments: the cephalothorax and the abdomen.

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Deutsch: Aragonit / Español: Aragonito / Português: Aragonita / Français: Aragonite / Italiano: Aragonite

Aragonite in the environment context refers to a naturally occurring crystal form of calcium carbonate (CaCO₃), essential in marine ecosystems. It is one of the two main crystal structures—along with calcite—that marine organisms use to build shells and skeletons. Aragonite plays a critical role in ocean chemistry, carbonate cycling, and the health of coral reefs and shell-forming species.

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