/ (daɪˈɒptə) /
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a unit for measuring the refractive power of a lens: the reciprocal of the focal length of the lens expressed in metres
QUIZ YOURSELF ON AFFECT VS. EFFECT!
In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.
Derived forms of dioptredioptral, adjective
Word Origin for dioptre
C16: from Latin dioptra optical instrument, from Greek, from dia- through + opsesthai to see
Words nearby dioptre
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012