Sentence:  The protein bound iodine <WSD>was</WSD> 6.6 | mg. % , and the radioactive iodine uptake over the thyroid gland was 46 % in 24 hours , with a conversion ratio of 12 % . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)