- peristome - (botany) fringe of toothlike appendages surrounding the mouth of a moss capsule
--1 is a kind of plant process, enation
--1 is a part of capsule- peristome - region around the mouth in various invertebrates
--2 is a kind of structure, anatomical structure, complex body part, bodily structure, body structure
--2 is a part of invertebrate - peristome - region around the mouth in various invertebrates