I read about it in Davison’s manifesto: it’s advanced as a term for meoisis that is presumed to have halted after the first chromosomal division. If you google the term, almost all the results that are returned are those of Davison’s writings, including an article written by a geneticist that specifically refutes his notions*. It’s a term of limited use, possibly invented by Davison himself (I can find no other reliable source for this term), with no evidence to support the use to which Davison ascribes to it, the proposal that new taxa arise as ‘hopeful monsters’. As so much in Davison’s manifesto is either factually wrong or at least 50 years out of date I don’t consider him to be a reliable source of biological insights.