sycamine noun1 •A tree, mentioned in Luke's Gospel, and thought to be the black mulberry.The lorde sayde: yf ye had fayth lyke a grayne off mustard sede / and shulde saye vnto thys sycamyne tree / plucke thy silfe vppe by the rotes / and plant thy silfe in the see: he shoulde obey you. — 1526 formssycamines