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1.
Pronunciation: \-jē\
Function: noun
Inflected Form(s): plural tweet·y·mol·o·gies
Etymology: from English Twitter + from Greek, -logia -logy
Date: 20th century

1 : the history of a linguistic form (as a word) and its evolution shown by tracing its transmission from tweet to tweet on the social networking and microblogging site Twitter.

2: how people are using a given word on Twitter, Facebook, and other social networking sites.
"Tweetymology question on the superlative form of emo: Is it 'emoest' or 'emost'? Let's take a poll."
by sammyholloway February 03, 2010