Sentence:  In the neighborhood of an end point of an interval of tangent points in the f-plane the function is two valued or no valued on one side , and is a single valued function consisting <WSD>entirely</WSD> of tangent points on the other side . 
Meaning of the word marked with <WSD> tags:  to a complete degree or to the full or entire extent (`whole' is often used informally for `wholly')