Sentence:  The following information on snakes varying greatly in size ( but all with less than a 10 - <WSD>foot</WSD> maximum ) shows , when considered with the foregoing , that there is probably no correlation between the length of a snake and the time required for it to mature . 
Meaning of the word marked with <WSD> tags:  a linear unit of length equal to 12 inches or a third of a yard