Definition of metastomial in English:

metastomial

noun

Zoology
rare
  • Of or relating to the part of the head of a metameric invertebrate that is located behind the mouth.

Origin

Late 19th century; earliest use found in Ray Lankester (1847–1929), zoologist. From metastomium + -al.

Pronunciation

metastomial

/ˌmɛtəˈstəʊmɪəl/