de·fo·li·ant 
(dē-fōlē-ənt)
(dē-fōlē-ənt)n.
A chemical sprayed or dusted on plants to cause the leaves to fall off.
- preparer
- prepay
- prepayment
- prepend
- prepense
- prepensely
- preponderance
- preponderancy
- preponderant
- preponderantly
- preponderate
- preponderately
- preponderation
- preposition
- preposition
- pre-position
- prepositional
- prepositionally
- prepositional phrase
- prepositive
- prepositively
- prepossess
- prepossessing
- prepossessingly
- prepossession