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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a gadget; dingus; thingumbob. |
| physical chemistry | |
| —n | |
| the branch of chemistry concerned with the way in which the physical properties of substances depend on and influence their chemical structure, properties, and reactions | |
physical chemistry n.
Scientific analysis of the properties and behavior of chemical systems primarily by physical theory and technique.
| physical chemistry
The branch of chemistry that is concerned with the physical structure of chemical compounds, the amount of energy they have, the way they react with other compounds, and the bonds that hold their atoms together. |