Definition of moo:
- ululate (part of speech: verb)
- ululation (part of speech: noun)
- "Travels in China, Containing Descriptions, Observations, and Comparisons, Made and Collected in the Course of a Short Residence at the Imperial Palace of Yuen-Min-Yuen, and on a Subsequent Journey through the Country from Pekin to Canton", John Barrow.
It was: " Oh, my poor pet Mumpsy, and he didn't like a nasty great big ugly heavy foot an his poor soft silky- mum- mum- back, he didn't, and he soodn't that he- mum- mum - soodn't; and he cried out and knew the place to come to, and was oh so sorry for what had happened to him- mum- mum- mum- and now he was going to be made happy, his mistress make him happy- mum- mum- mum- moo- o- o- o."- "The Complete Project Gutenberg Works of George Meredith", George Meredith.
- "Lectures on The Science of Language", Max Müller.