The definition of a cay is a sand bar or small island made up or sand or coral.noun
An example of a cay is Sand Key in the Florida Keys.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Origin: Sp cayo
Used by arrangement with John Wiley & Sons, Inc.
Origin: Alteration (influenced by quay) of Spanish cayo, probably from Taino.
cay - Science Definition
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