Sentence:  Hence , when the address * * f is computed from * * f , the cell * * f and <WSD>all</WSD> Y-cells in its chain must be inspected to determine whether * * f is already in the form list or whether it should be added to the form list and the chain . 
Meaning of the word marked with <WSD> tags:  quantifier; used with either mass or count nouns to indicate the whole number or amount of or every one of a class