2 [dahyk]
noun Slang: Often Disparaging and Offensive.

dikey, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dike (daɪk)
n, —vb
a variant spelling of dyke

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

O.E. dic "trench, ditch," from P.Gmc. *dik- (cf. O.N. diki, Du. dijk, Ger. Deich), from PIE base *dheigw- "to pierce, fasten" (cf. Skt. dehi- "wall," O.Pers. dida "wall, stronghold, fortress," Pers. diz). At first "an excavation," later (1487) applied to the resulting earth mound; a sense development
paralleled by cognate forms in many other languages. This is the northern variant of the word, which in the south of England yielded ditch.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
dike   (dīk)  Pronunciation Key 
  1. A body of igneous rock that cuts across the structure of adjoining rock, usually as a result of the intrusion of magma. Dikes are often of a different composition from the rock they cut across. They are usually on the order of centimeters to meters across and up to tens of kilometers long. See illustration at batholith.

  2. An embankment of earth and rock built to prevent floods or to hold irrigation water in for agricultural purposes.

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