|Photo by Hans Dinkelberg|
Noun. Late 18th century.
[Latin bibliopola from Greek bibliopoles, from biblion book + poles seller.]
A dealer in (especially rare) books.
As someone that knew a number of antique book dealers growing up, I must confess that I had never heard the word bibliopole before. Even now it seems fairly obscure; a search on the internet for bibliopole yields surprisingly few relevant results. It's all positively conspiratorial!
To pounce on the OED's ambiguity for effect, it does seem fitting that a dealer in especially rare books would have an especially rare word for the profession. And perhaps they have good reason to be furtive, as rare books can fetch a pretty penny indeed. A first edition copy of The Canterbury Tales, for example, fetched £4.6 million at auction. Even for a bibliopole with a serious parchment-mite allergy, that's not a sum to be sniffed at.