I sent out an agent query for my novel WEEKEND GETAWAYS, OR ADVENTURES IN CONTRACT KILLING. Got a response within an hour indicating that the word count (just over 52,000 words) was too short for a novel.
I sent out a query to a small press that published Bizarro fiction. The submissions editor was impressed, but said he was only dealing currently with novellas from between 15,000 and 30,000.
NaNoWriMo uses the mark of 50,000 as their guideline. this from their website:
National Novel Writing Month is a fun, seat-of-your-pants approach to novel writing. Participants begin writing November 1. The goal is to write a 175-page (50,000-word) novel by midnight, November 30. (My boldface.)
50,000 words is a novel, is not a novel, is a novel.
What is a novel?