WordReference Random House Learner's Dictionary of American English © 2017
oph•thal•mol•o•gy /ˌɑfθəlˈmɑlədʒi, -θə-, ˌɑp-/USA pronunciation   n. [uncountable]
  1. Ophthalmologythe branch of medicine dealing with the physical structure, functions, and diseases of the eye.
oph•thal•mol•o•gist, n. [countable]An ophthalmologist treats diseases of the eye; an optometrist tests your eyes and measures them for glasses.See -opti-.

WordReference Random House Unabridged Dictionary of American English © 2017
oph•thal•mol•o•gy  (of′thəl molə jē, -thə-, -thal-, op′-),USA pronunciation n. 
  1. Ophthalmologythe branch of medical science dealing with the anatomy, functions, and diseases of the eye.
oph•thal•mo•log•i•cal  (of thal′mə loji kəl, op-),USA pronunciation  oph•thal′mo•logic, adj. 
  • 1835–45; ophthalmo- + -logy

Collins Concise English Dictionary © HarperCollins Publishers::

ophthalmology /ˌɒfθælˈmɒlədʒɪ/ n
  1. the branch of medicine concerned with the eye and its diseases

ophthalmological /ɒfˌθælməˈlɒdʒɪkəl/ adj

'ophthalmology' also found in these entries:

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