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perisperm
perissodactyl
peristalsis
peristome
peristyle
perithecium
peritoneum
peritonitis
peritrack
peritrich
periwig
periwinkle (1)
periwinkle (2)
perjink
perjure
perjured
perjury
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perlite
per·lite [ púr lt ]


noun 
Definition:
 
glass grains: a grayish volcanic glass in the form of grains that resemble pearls. It is often added to potting soil as a conditioner and is also used as a heat insulator.

per·lit·ic [ pur líttik ] adjective
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