rhynchodaeumn.

Brit.

/rɪŋkə(ʊ)ˈdiːəm/, U.S.

/ˌrɪŋkoʊˈdiəm/

Inflections: Plural rhynchodaea Brit.

/rɪŋkə(ʊ)ˈdiːə/, U.S.

/ˌrɪŋkoʊˈdiə/.

Forms: 1800s– rhynchodaeum, 1800s– rhynchodeum, 1900s– rhyncodaeum, 1900s– rhyncodeum.

Origin: A borrowing from German. Etymon: German Rhynchodaeum.

Etymology: < German Rhynchodaeum (1888 or earlier) < rhyncho- rhyncho- comb. form + ancient Greek ὁδαῖος that is on or by the road, after English proctodeum n., stomodaeum n.

Zoology.

In certain invertebrates with an eversible proboscis (as nemerteans, whelks, etc.): the cavity or chamber lying between the retracted proboscis and the exterior, through which the proboscis may be everted.

ΘΚΠ

the world > animals > invertebrates > bodies or parts > [noun] > equivalent of the mouth > proboscis or tongue > cavity containing

rhynchodaeum1890

1890 Ann. & Mag. Nat. Hist. 6 404 The ganglia of the brain are united by a dorsal commissure, which passes above the rhynchodæum in Carinella and above the rhynchocœlom in Cerebratulus and Drepanophorus.

1898 Ann. N.Y. Acad. Sci. 11 207 Mouth opens into the rhynchodeum; proboscis very short.

1972 R. Gibson Nemerteans i. 38 The proboscis pore opens immediately into the rhynchodaeum, a rather short tubular chamber.

2008 Jrnl. Molluscan Stud. 74 28/2 The ventral right wall of the rhynchodaeum forms a massive tongue-shaped outgrowth that occupies the right half of the rhynchocoel.

Derivatives

rhynchoˈdaeal adj.

ΘΚΠ

the world > animals > invertebrates > bodies or parts > [adjective] > relating to mouth and stomach > relating to part containing mouth

rhynchodaeal1900

1900 Amer. Naturalist 34 334 The rhynchodæal glands of Tetrarhynchus.

1972 R. Gibson Nemerteans i. 38 Rhynchodaeal musculature, if present, is usually weak and predominantly composed of circular fibres.

1998 N.Z. Jrnl. Zool. 25 290/2 The rhynchodaeal epithelium extends to the dorsal lip of the mouth.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	rhynchodaeum
释义	rhynchodaeumn. Brit. /rɪŋkə(ʊ)ˈdiːəm/, U.S. /ˌrɪŋkoʊˈdiəm/ Inflections: Plural rhynchodaea Brit. /rɪŋkə(ʊ)ˈdiːə/, U.S. /ˌrɪŋkoʊˈdiə/. Forms: 1800s– rhynchodaeum, 1800s– rhynchodeum, 1900s– rhyncodaeum, 1900s– rhyncodeum. Origin: A borrowing from German. Etymon: German Rhynchodaeum. Etymology: < German Rhynchodaeum (1888 or earlier) < rhyncho- rhyncho- comb. form + ancient Greek ὁδαῖος that is on or by the road, after English proctodeum n., stomodaeum n. Zoology. In certain invertebrates with an eversible proboscis (as nemerteans, whelks, etc.): the cavity or chamber lying between the retracted proboscis and the exterior, through which the proboscis may be everted. ΘΚΠ the world > animals > invertebrates > bodies or parts > [noun] > equivalent of the mouth > proboscis or tongue > cavity containing rhynchodaeum1890 1890 Ann. & Mag. Nat. Hist. 6 404 The ganglia of the brain are united by a dorsal commissure, which passes above the rhynchodæum in Carinella and above the rhynchocœlom in Cerebratulus and Drepanophorus. 1898 Ann. N.Y. Acad. Sci. 11 207 Mouth opens into the rhynchodeum; proboscis very short. 1972 R. Gibson Nemerteans i. 38 The proboscis pore opens immediately into the rhynchodaeum, a rather short tubular chamber. 2008 Jrnl. Molluscan Stud. 74 28/2 The ventral right wall of the rhynchodaeum forms a massive tongue-shaped outgrowth that occupies the right half of the rhynchocoel. Derivatives rhynchoˈdaeal adj. ΘΚΠ the world > animals > invertebrates > bodies or parts > [adjective] > relating to mouth and stomach > relating to part containing mouth rhynchodaeal1900 1900 Amer. Naturalist 34 334 The rhynchodæal glands of Tetrarhynchus. 1972 R. Gibson Nemerteans i. 38 Rhynchodaeal musculature, if present, is usually weak and predominantly composed of circular fibres. 1998 N.Z. Jrnl. Zool. 25 290/2 The rhynchodaeal epithelium extends to the dorsal lip of the mouth. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1890
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