diopsimeter

 [dahy-uhp-sim-i-ter]  

di·op·sim·e·ter

   [dahy-uhp-sim-i-ter]
noun Ophthalmology.
an instrument for measuring the field of vision.
AEIL Radiation Dosimetry www.aeil.com/ Low cost, high quality, dosimetry and radiation safety services.
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Origin:
di-3 + Greek ops- (stem of ópsis) sight, vision + -i- + -meter
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Diopsimeter has a plethora of syllables.
So is dichlorodiphenyltrichloroethane. Does it mean:
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
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.
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