peristome
noun
peri·stome ˈper-ə-ˌstōm 
1
: the fringe of teeth surrounding the orifice of a moss capsule
2
: the region around the mouth in various invertebrates
peristomial
ˌper-ə-ˈstō-mē-əl
adjective 
Word History
Etymology
New Latin peristoma, from peri- + Greek stoma mouth — more at stomach entry 1
First Known Use
1799, in the meaning defined at sense 1
Medical Definition
peristome
noun
peri·stome ˈper-ə-ˌstōm
: the area surrounding the mouth or cytostome of a protozoan
- prepositively
- prepositives
- prepositor
- prepositors
- prepositure
- prepositus
- prepossess
- prepossessed
- prepossesses
- prepossessing
- prepossessingnesses
- prepossession
- prepossessions
- preposterous
- preposterously
- preposterousness
- preposterousnesses
- prepostor
- prepotence
- prepotencies
- prepotency
- prepotent
- prepotently
- prepped
- prepper