Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
diplopia is a noun meaning "visual impairment in which an object is seen as two objects". It carries one recorded sense.
visual impairment in which an object is seen as two objects
“diplopia often disappears when one eye is covered”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for diplopia come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.