pandanus: any of various Old World tropical palmlike trees having huge prop roots and edible conelike fruits and leaves like pineapple leaves
tree: a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms
naegele's rule: rule for calculating an expected delivery date; subtract three months from the first day of the last menstrual period and add seven days to that date