I’m trying to track down the first printed use of the word diagram in English. Can anyone tell me the name, author, and date of the publication in question? It would be especially valuable, on top of that, to have an excerpted passage containing the word, in order to infer its intended meaning from its context.
The OED says it was on page 16 of A astronomicall description of the late comet by John Bainbridge in 1619, occurring in this sentence:
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Robinson, Robert, The art of pronuntiation digested into two parts, London, 1617, no page no:
Ridley, Mark, A short treatise of magneticall bodies and motions, London, 1613, page 126: