Webster's English Dictionary

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glycoside

gly.co.side \'gli--k*-.si-d\ \.gli--k*-'sid-ik\ \-i-k(*-)le-\ n [ISV, fr. 
   glycose, alter. of glucose] : any of numerous acetal derivatives of sugars 
   that on hydrolysis yield a  sugar (as glucose) - gly.co.sid.ic aj