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chemical British & World English

Relating to chemistry, or the interactions of substances as studied in chemistry

chemical cosh British & World English

A narcotic drug or drugs used to subdue a disruptive person, typically a patient in an institution

chemical-free British & World English

(Of farming or cultivation) not involving the use of artificial chemicals, especially pesticides or fertilizers

non-chemical British & World English

Not containing or involving the use of artificial chemicals

chemical toilet British & World English

A toilet that is not connected to a sewage system but has a compartment in which waste is treated with chemicals for temporary storage

chemical potential British & World English

A thermodynamic function expressing the ability of an uncharged atom or molecule in a chemical system to perform physical work

chemical reaction British & World English

A process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction

physico-chemical British & World English

Relating to physics and chemistry or to physical chemistry

chemical dependency British & World English

Addiction to a mood- or mind-altering drug, such as alcohol or cocaine

chemical engineering British & World English

The branch of engineering concerned with the design and operation of industrial chemical plants

chemical weathering British & World English

The erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes

agrochemical British & World English

A chemical used in agriculture, such as a pesticide or a fertilizer

chemical bond in bond British & World English

A strong force of attraction holding atoms together in a molecule or crystal, resulting from the sharing or transfer of electrons

chemical element in element British & World English

Each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms

chemical formula in formula British & World English

A set of chemical symbols showing the elements present in a compound and their relative proportions

petrochemical British & World English

Relating to or denoting substances obtained by the refining and processing of petroleum or natural gas

physiochemical British & World English

Relating to physiological chemistry

chemical compound in compound1 British & World English

A substance formed from two or more elements chemically united in fixed proportions


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