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| 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). |
| parallelogram (ˌpærəˈlɛləˌɡræm) | |
| —n | |
| rhombus rectangle trapezium See also trapezoid a quadrilateral whose opposite sides are parallel and equal in length | |
| [C16: via French from Late Latin, from Greek parallēlogrammon, from parallēlos | |
| parallelogram (pār'ə-lěl'ə-grām') Pronunciation Key
A four-sided plane figure with opposite sides parallel. Rhombuses and rectangles are parallelograms. |