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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). |
ophthalmodynamometer oph·thal·mo·dy·na·mom·e·ter (ŏf-thāl'mō-dī'nə-mŏm'ĭ-tər, ŏp-)
n.
An instrument for determining the near point of convergence of the eyes.
An instrument that measures the blood pressure in the retinal vessels.