say it: HAH-luh-gram
hologram is a noun meaning "the intermediate photograph (or photographic record) that contains information for reproducing a three-dimensional image by holography". It carries one recorded sense.
the intermediate photograph (or photographic record) that contains information for reproducing a three-dimensional image by holography
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 hologram come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.