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

peristomial

play \ˌper-ə-ˈstō-mē-əl\ adjective

Origin and Etymology of peristome

New Latin peristoma, from peri- + Greek stoma mouth — more at stomach


Medical Dictionary

peristome

noun peri·stome \ ˈper-ə-ˌstōm \

medical Definition of peristome

: the area surrounding the mouth or cytostome of a protozoan

peristomial

play \ˌper-ə-ˈstō-mē-əl\ adjective

Seen and Heard

What made you want to look up peristome? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to remove or wipe out

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!