metastomialn.

Brit.

/ˌmɛtəˈstəʊmɪəl/, U.S.

/ˌmɛdəˈstoʊmiəl/

Origin: Formed within English, by derivation. Etymons: metastomium n., -al suffix¹.

Etymology: < metastomium n. + -al suffix¹.

Zoology. rare.

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

ΚΠ

1877 E. R. Lankester in Q. Jrnl. Microsc. Sci. 17 427 Each succeeding metamere corresponds only to the metastomial portion of the first metamere.

1894 Amer. Naturalist 28 222 Behind the mouth a metastomial plate or pair of plates.

1958 Q. Rev. Biol. 33 38/2 In recent polychaetes the prostomium is modified by cephalization of peristomial and metastomial elements.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metastomial
释义	metastomialn. Brit. /ˌmɛtəˈstəʊmɪəl/, U.S. /ˌmɛdəˈstoʊmiəl/ Origin: Formed within English, by derivation. Etymons: metastomium n., -al suffix¹. Etymology: < metastomium n. + -al suffix¹. Zoology. rare. Of or relating to the part of the head of a metameric invertebrate that is located behind the mouth. ΚΠ 1877 E. R. Lankester in Q. Jrnl. Microsc. Sci. 17 427 Each succeeding metamere corresponds only to the metastomial portion of the first metamere. 1894 Amer. Naturalist 28 222 Behind the mouth a metastomial plate or pair of plates. 1958 Q. Rev. Biol. 33 38/2 In recent polychaetes the prostomium is modified by cephalization of peristomial and metastomial elements. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1877
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