| a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S. |
| the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language). |
macroevolution (māk'rō-ěv'ə-l 'shən) Pronunciation Key
Evolution that results in the formation of a new taxonomic group above the level of a species. |