Sentence:  When a dot appears close to the end of the transverse line , the `` moderate '' rating may be <WSD>further</WSD> classified according to the position of the dot with respect to the vertical marking denoting the mean age . 
Meaning of the word marked with <WSD> tags:  to or at a greater extent or degree or a more advanced stage (`further' is used more often than `farther' in this abstract sense)