Sentence:  The George-Barden Act of 1946 raised the previous increases in annual authorizations to $ 29 <WSD>million</WSD> in addition to the $ 7 million under the Smith Act . 
Meaning of the word marked with <WSD> tags:  (in Roman numerals, M written with a macron over it) denoting a quantity consisting of 1,000,000 items or units