LEAF
noun, often attributive \ ˈlēf \ plural leaves \ˈlēvz\
1 :outgrowth from a plant stem that is typically a flattened expanded variably shaped greenish organ, constitutes a unit of the foliage, and
functions primarily in food manufacture by photosynthesis
2 : a modified leaf (such as a bract or sepal) primarily engaged in functions other than food manufacture
STONE
noun \ ˈstōn \
1: a concretion of earthy or mineral matter: a (1) : such a concretion of indeterminate size or shape
2 : rock