Definition of rusk noun from the Oxford Advanced Learner's Dictionary

 

rusk

 noun
noun
BrE BrE//rʌsk//
 
; NAmE NAmE//rʌsk//
 
(especially British English) Carbohydrates
 
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a hard crisp biscuit for babies to eat See related entries: Carbohydrates Word Origin late 16th cent.: from Spanish or Portuguese rosca ‘twist, coil, roll of bread’, of unknown ultimate origin.