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diacritical mark
diacylglycerol
diadelphous
diadem
diadem spider
Diadochi
diadochy
diadromous
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diag.
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diachronic
di·a·chron·ic [ d ə krónnik ]


adjective 
Definition:
 
concerning historical development: relating to or involving the study or development of something, especially a language, through time
See also  synchronic
diachronic linguistics
[Mid-19th century. <dia- + Greek khronos "time"]

di·a·chron·i·cal·ly adverb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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