This is a well-used copy that my wife has had on her shelf for almost 30 years. Wrote the date in it herself, 1972 as I said.
I checked the printed copyright date just to be sure: 1972.
I'll go recheck my Stedman's, Tabors, and Dorlands, in case I have made a mistake (a possibility). Part of my research on this issue apparently is going to have to be collecting definitions from medical dictionaries over several decades.
Of course, the english language dictionaries are all unanimous.
But they have no agenda...yet...