define chemical
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Chemical noun, plural: chemicals. (1) A substance made up of chemical elements or produced from a chemical process. (2) A drug, especially illicit or addictive drug. adjective. Of, relating to, or pertaining to, chemistry or a chemical substance.
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AMPHOTERIC chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions. acidic - being or containing an acid; of a solution having an excess of hydrogen atoms (having a pH of less than 7)
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chemistry A chemist at work in her chemistry laboratory. A chemist at work in her chemistry laboratory. The definition of chemistry is a branch of science that deals with the form and properties of matter and substances or the interaction between individuals.
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chemical reaction Definition of chemical reaction. : a chemical change that occurs when two or more substances combine to form a new substance.
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Chemical substance A pure chemical compound is a chemical substance that is composed of a particular set of molecules or ions. Two or more elements combined into one substance through a chemical reaction form a chemical compound. All compounds are substances, but not all substances are compounds.
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chemical 2. a substance composed of chemical elements, or obtained by chemical processes. See also toxin. chemical adjuvant. a chemical added to another to improve its activity. For example, mineral gels added to vaccines. May also be a chemical added to feed to improve digestion, e.g. monensin in ruminants.
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- chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions. natural philosophy, physics - the science of matter and energy and their interactions; his favorite subject was physics.
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Chemical compound A chemical compound is a chemical formed from atoms of different chemical elements. The different atoms are joined by chemical bonds. The elements stick together so strongly that the compound behaves like one substance. The chemical that is made depends upon what atoms it is made of and how they are joined together.
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organic chemistry Full Definition of CHEMISTRY. 1. : a science that deals with the composition, structure, and properties of substances and with the transformations that they undergo. 2. 3.
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Definition of Compound Definition of Compound. A compound is a substance formed when two or more chemical elements are chemically bonded together. Two types of chemical bonds common in compounds are covalent bonds and ionic bonds. The elements in any compound are always present in fixed ratios. Example 1: Pure water is a compound made from two elements - hydrogen and oxygen. The ratio of hydrogen to oxygen in water is always 2:1.
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chemical 2 chemical. noun. : any substance (as an acid) that is formed when two or more other substances act upon one another or that is used to produce a change in another substance.Spanish Central: Spanish translation of chemical. chemical. noun. : any substance (as an acid) that is formed when two or more other substances act upon one another or that is used to produce a change in another substance.
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chemical agent Definition of chemical agent: Solid, liquid, or gaseous substance that produces an effect on a living organism by acting on the body tissue, or in an environment by interacting with air, water, and/or soil.
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- A chemical compound is a chemical combination of two or more elements that can normally be broken down into simpler substances by chemical means and have properties different form those of its component elements.
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- To grow annual baby's breath, or gypsophila elegans, start the plant by seed indoors, provide full, hot sun, use a good drainage area, and water the plant well. Use baby's breath as filler plants with roses and other flowers using advice from a sustainable gardener in this free video on gardening.
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CHEMICAL REACTION chemical science, chemistry-the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions. addition reaction-a chemical reaction in which one molecule is added to another. aldol reaction-a reaction of aldehydes resulting in an aldol.
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Chemical substance Broader definitions of chemicals or chemical substances can be found, for example: the term 'chemical substance' means any organic or inorganic substance of a particular molecular identity, including – (i) any combination of such substances occurring in whole or in part as a result of a chemical reaction or occurring in nature.
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What Is a Chemical Compound? - Definition & Examples A chemical compound is a chemical combination of two or more elements that can normally be broken down into simpler substances by chemical means and have properties different form those of its component elements. Chemical compounds are formed by elements that bond together.
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chemical Noun. 1. reactant-a chemical substance that is present at the start of a chemical reaction. chemical, chemical substance-material produced by or used in a reaction involving changes in atoms or molecules.1  Facebook. 2  Twitter.oun. 1. reactant-a chemical substance that is present at the start of a chemical reaction. chemical, chemical substance-material produced by or used in a reaction involving changes in atoms or molecules.
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Definition of Element An element is a substance consisting of atoms which all have the same number of protons-i.e. the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down using chemical methods. Elements can only be changed into other elements using nuclear methods.
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Chemical compound A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. The ratio of each element is usually expressed by chemical formula. For example, water (H2O) is a compound consisting of two hydrogen atoms bonded to an oxygen atom. The atoms within a compound can be held together by a variety of interactions, ranging from covalent bonds to electrostatic forces in ionic bonds.
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Chemical substance A chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys. chemical compound can be either atoms bonded together in molecules or crystals in which atoms, molecules or ions form a crystalline lattice. Compounds based primarily on carbon and hydrogen atoms are called organic compounds, and all others are called inorganic compounds.
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chemical chemical - of or made from or using substances produced by or used in reactions involving atomic or molecular changes; chemical fertilizer. noun compound, drug, substance, synthetic substance, potion The whole food-chain is affected by the over-use of chemicals in agriculture.
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Definitions &Translations Webster Dictionary (0.00 / 0 votes) Rate this definition: Chemistry (noun) that branch of science which treats of the composition of substances, and of the changes which they undergo in consequence of alterations in the constitution of the molecules, which depend upon variations of the number, kind, or mode of arrangement, of the constituent atoms.
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- A chemical compound is a PURE substance that has two or more different types of atoms in that have chemically bonded (e.g. Iron atoms, Oxygen atoms). The ratio of all atoms in… a particular compound (as shown in its molecular formula) is unique for that specific compound.
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- Chemistry definition, the science that deals with the composition and properties of substances and various elementary forms of matter. See more.
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chemistry chemistry - the chemical composition and properties of a substance or object; the chemistry of soil. substance - the real physical matter of which a person or thing consists; DNA is the substance of our genes.