My new favourite word, as it describes a phenomenon which happens to me all the time: the coincidence of learning something new (usually a word) and then almost immediately noticing it turning up in the book you were already reading, a radio programme you listen to every day, etc.
It was coined by Aldiboronti, a member of the Wordorigins.org discussion group:
It is a play on serendipity, as Serendip is an old name for Sri Lanka. For this concept, Aldi chose another Indian Ocean island as the namesake.
I don’t know how widely accepted it is, but I hope to promulgate it by using it as often as possible.