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wordnet

http://wordnetweb.princeton.edu/perl/webwn?s=%s
From the homepage:
WordNet® is a large lexical database of English, developed under the direction
of George A. Miller. Nouns, verbs, adjectives and adverbs are grouped into sets
of cognitive synonyms (synsets), each expressing a distinct concept. Synsets are
interlinked by means of conceptual-semantic and lexical relations. The resulting
network of meaningfully related words and concepts can be navigated with the
browser. WordNet is also freely and publicly available for download. WordNet's
structure makes it a useful tool for computational linguistics and natural
language processing.

Example: wordnet sesquipedalian



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Old implementation:
http://wordnet.princeton.edu/perl/webwn?s=%s
    
985 uses - Created 2005-06-21 04:59:14 - Last used 2024-07-27 02:43:40
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