Sentence:  Anatomically , the <WSD>horse</WSD> lung appears to be remarkably like that of man , insofar as this can be ascertained from comparison of our findings in the horse with those of others ( Birnbaum , ' 54 ) in the human being . 
Meaning of the word marked with <WSD> tags:  solid-hoofed herbivorous quadruped domesticated since prehistoric times