Definition of peristomial in English:

peristomial

adjective

  • 1Botany. Of or relating to the peristome of a moss.

  • 2Zoology. Of or relating to the peristome of an invertebrate; surrounding the mouth, circumoral.

Origin

Mid 19th century. From peristomium + -al. Compare earlier peristomal.

Pronunciation

peristomial

/ˌpɛrɪˈstəʊmɪəl/