
The Neogrammarians (also Young Grammarians, German Junggrammatiker) were a German school of linguists, originally at the University of Leipzig, in the late 19th century who proposed the Neogrammarian hypothesis of the regularity of sound change. According to this hypothesis, a diachronic sound change affects simultaneously all words in which its e...
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http://en.wikipedia.org/wiki/Neogrammarian

linguist who contends that phonetic laws are exceptionless
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http://phrontistery.info/n.html

• (n.) One of a group of philologists who apply phonetic laws more widely and strictly than was formerly done, and who maintain that these laws admit of no real exceptions.
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http://thinkexist.com/dictionary/meaning/neogrammarian/

any of a group of German scholars that arose around 1875; their chief tenet concerning language change was that sound laws have no exceptions. This ... [4 related articles]
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http://www.britannica.com/eb/a-z/n/25
Ne`o·gram·ma'ri·an noun [
Neo- +
grammarian ; a translation of German
junggrammatiker .] One of a group of philologists who apply phonetic laws more widely and strictly than was formerly done, and who maintain that these laws admit of no real exceptions. --
Ne`o*gram*mat'ic*a...
Found on http://www.encyclo.co.uk/webster/N/13
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