Definition of orthokeratology in English:

orthokeratology

Syllabification: or·tho·ker·a·tol·o·gy
Pronunciation: /ˌôrTHōˌkerəˈtäləjē/

Entry from US English dictionary

noun

The temporary reshaping of the cornea (usually overnight) with specially made rigid contact lenses, in order to correct myopia.

Definition of orthokeratology in:

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Word of the day notional
Pronunciation: ˈnəʊʃ(ə)n(ə)l
adjective
existing only in theory or as a suggestion…