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double-dome

[duhb-uh l-dohm]
noun Slang: Usually Disparaging.
  1. an intellectual; egghead.
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Origin of double-dome

First recorded in 1935–40
Related formsdou·ble-domed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018