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oligophrenia

[ol-i-goh-free-nee-uh, uh-lig-uh-]
noun Pathology.
  1. less than normal mental development.
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Origin of oligophrenia

From New Latin, dating back to 1895–1900; see origin at oligo-, phren-, -ia
Related formsol·i·go·phren·ic [ol-i-goh-fren-ik, uh-lig-uh-] /ˌɒl ɪ goʊˈfrɛn ɪk, əˌlɪg ə-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018