Dictionary

peristome

noun peri·stome \ˈper-ə-ˌstōm\

Definition of PERISTOME

1
:  the fringe of teeth surrounding the orifice of a moss capsule
2
:  the region around the mouth in various invertebrates
peri·sto·mi·al \ˌper-ə-ˈstō-mē-əl\ adjective

Origin of PERISTOME

New Latin peristoma, from peri- + Greek stoma mouth — more at stomach
First Known Use: circa 1796

peristome

noun peri·stome \ˈper-ə-ˌstōm\   (Medical Dictionary)

Medical Definition of PERISTOME

:  the area surrounding the mouth or cytostome of a protozoan
peri·sto·mi·al \ˌper-ə-ˈstō-mē-əl\ adjective

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