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deltiology

[del-tee-ol-uh-jee]
noun
  1. the hobby of collecting post cards.
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Origin of deltiology

1945–50; < Greek deltí(on), diminutive of déltos writing tablet + -o- + -logy
Related formsdel·ti·o·log·i·cal [del-tee-uh-loj-i-kuh l] /ˌdɛl ti əˈlɒdʒ ɪ kəl/, adjectivedel·ti·ol·o·gist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for deltiologist

deltiology

noun
  1. the collection and study of picture postcards
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Derived Formsdeltiologist, noun

Word Origin

C20: from Greek deltion, diminutive of deltos a writing tablet + -logy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012