pterygostomen.

Brit.

/ˈtɛrɪɡəˌstəʊm/, U.S.

/ˈtɛrɪɡəˌstoʊm/

Origin: Formed within English, by compounding. Etymons: pterygo- comb. form, -stome comb. form.

Etymology: < pterygo- comb. form + -stome comb. form. Compare earlier pterygostomian adj.

Zoology.

In certain decapod crustaceans: either of a pair of winglike projections of the anterior edge of the ventral carapace, flanking the buccal cavity; this region of the carapace.

ΚΠ

1852 J. D. Dana U.S. Exploring Exped.: Crustacea Pt. I 367 The pterygostome has a smooth channel parallel with the sides of the buccal area.

1982 Comptes Rendus Acad. Sci. Sér. III. 295 715 As ventilation breathing cannot occur in the normal way.., two large slots situated at the base of the pterygostome serve this purpose.

1999 Jrnl.Crustacean Biol. 19 660/2 Toothed margin descending anteriorly to pterygostome as tuberculate ridge.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	pterygostome
释义	pterygostomen. Brit. /ˈtɛrɪɡəˌstəʊm/, U.S. /ˈtɛrɪɡəˌstoʊm/ Origin: Formed within English, by compounding. Etymons: pterygo- comb. form, -stome comb. form. Etymology: < pterygo- comb. form + -stome comb. form. Compare earlier pterygostomian adj. Zoology. In certain decapod crustaceans: either of a pair of winglike projections of the anterior edge of the ventral carapace, flanking the buccal cavity; this region of the carapace. ΚΠ 1852 J. D. Dana U.S. Exploring Exped.: Crustacea Pt. I 367 The pterygostome has a smooth channel parallel with the sides of the buccal area. 1982 Comptes Rendus Acad. Sci. Sér. III. 295 715 As ventilation breathing cannot occur in the normal way.., two large slots situated at the base of the pterygostome serve this purpose. 1999 Jrnl.Crustacean Biol. 19 660/2 Toothed margin descending anteriorly to pterygostome as tuberculate ridge. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1852
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