Sentence:  ... I can remember every volume among the three or four hundred books that made up the library of my father, the country doctor—three or four hundred besides those portentous leather-<WSD>clad</WSD> depositories of medical mystery filled with color plates depicting the awful intimacies of the innards; 
Meaning of the word marked with <WSD> tags:  ("in compounds") Covered, enveloped in or surrounded by a specified material or substance.