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.
- macrocyclic
- macrocyte
- macrocytic
- macrocytosis
- macrocytotic
- macroevolution
- macroevolutionary
- macrofauna
- macrofaunal
- macrofossil
- macrogamete
- macroglobulin
- macroglobulinemia
- macroglossia
- macrograph
- macrography
- macroinstruction
- macroinvertebrate
- macrolide
- macromere
- macromolecular
- macromolecule
- macron
- macronuclear
- macronucleus