factbookfactbook means A book of facts. Lexicurio rates it Sui generis — a strength score of 91 out of 100.EtymologyFrom fact + book.nounA book of facts.Down the rabbit holeEvery word is a door. Follow one.Often preceded byworldciamarketselectiontelevisioncableadoptionoecdintelligenceproliferationeconomicindustrymarketmediaabortionstatisticsassociationstelecommunications