GNU Collaborative International Dictionary of English

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1.       
   Oolite (?), n. [Gr. ῳὄν an egg + -lite: cf. F. ooithe. So named from its resemblance to the roe of fish.] (Geol.) A variety of limestone, consisting of small round grains, resembling the roe of a fish.  It sometimes constitutes extensive beds, as in the European Jurassic. See the Chart of Geology.
   
   [1913 Webster]