si·ma 
(sīmə)
(sīmə)n.
The lower layer of the earth's outer crust that underlies the sial and is rich in silica, iron, and magnesium.
[SI(LICA) + MA(GNESIUM).]
- phytopathogenic
- phytopathologic
- phytopathological
- phytopathologist
- phytopathology
- phytophagous
- phytoplankter
- phytoplankton
- phytoplanktonic
- phytoplasma
- phytoplasmic
- phytoremediation
- phytosanitary
- phytosociological
- phytosociologically
- phytosociologist
- phytosociology
- phytosterol
- phytotoxic
- phytotoxicity
- PHz
- pi
- pi
- PI
- pia