Sentence:  Who has not marked, where the full cheek should be, / Incipient lines of lank flaccidity, / <WSD>Lymphatic</WSD> pallor where the pink should glow, / And where the throb of transport, pulses low?— 
Meaning of the word marked with <WSD> tags:  Lacking energy or enthusiasm; having characteristics once associated with an excess of lymph: lack of muscle tone, paleness, sluggishness, etc.