Sentence:  At juice bars in Los Angeles ' 35 `` health '' stores , a new sensation <WSD>is</WSD> a pink , high-protein cocktail , concocted of dried eggs , powdered milk and cherry-flavored No-Cal , which sells for 59 per 8 - oz. glass . 
Meaning of the word marked with <WSD> tags:  be identical to; be someone or something