her·bi·cide 
(hûrbĭ-sīd′, ûr-)
(hûrbĭ-sīd′, ûr-)n.
A substance used to destroy or inhibit the growth of plants, especially weeds.
her′bi·cidal (-sīdl) adj.
- proposition
- propositional
- propositional calculus
- propositional function
- propositionally
- propositus
- propound
- propounder
- propoxyphene
- propraetor
- propraetorial
- propraetorian
- propranolol
- propria
- proprietarily
- proprietary
- proprietary colony
- proprietor
- proprietorial
- proprietorially
- proprietorship
- proprietress
- propriety
- proprioception
- proprioceptive