cestrumEtymologyFrom Latinized form of Ancient Greek κέστρον (késtron, “betony”).cestrum means any of genus Cestrum. Lexicurio rates it Sui generis — a strength score of 91 out of 100.nounAny of genus Cestrum“He had identified a cestrum, a malpighia, and a climbing vine he suspected was a cissus when Dorrie and Gerry came across the terrace and pulled up deck chairs on either side of him.”