aboraladj.

Brit.

/abˈɔːrəl/,

/abˈɔːrl̩/, U.S.

/æbˈɔrəl/

Origin: Formed within English, by derivation. Etymons: ab- prefix, oral adj.

Etymology: < ab- prefix + oral adj.

1. Zoology. Designating, situated on, or relating to the side, end, or surface of an animal's body that is furthest from the mouth, especially in forms (as some echinoderms) which do not have clear upper and lower sides or anterior and posterior ends. Cf. adoral adj.

ΘΚΠ

the world > animals > animal body > general parts > [adjective] > relating to region at opposite end from mouth

aboral1857

1857 L. J. R. Agassiz Contrib. Nat. Hist. U.S.A. IV. 376 I have called this side [of radiate animals] the oral or actinal area, and the opposite side the aboral or abactinal area.

1878 A. Macalister Zool. Invertebr. Animals 56 The intestine..ends in a small aboral sac or cloaca.

1906 S. J. Hickson in Cambr. Nat. Hist. I. xiv. 386 The calicoblasts form..a skeletal plate at the aboral end of the coral embryo.

1962 D. Nichols Echinoderms v. 66 In the urchin immediately after metamorphosis the whole of the aboral surface is covered by an apical disk of plates.

2004 R. Dawkins Ancestor's Tale 349 Cnidarians..don't have an anterior/posterior axis, nor a dorsal/ventral one. They have an oral/aboral (mouth versus opposite-to-mouth) axis.

2. Medicine. = aborad adj.

ΚΠ

1898 Philos. Trans. (Royal Soc.) B. 190 135 The downward, posterior, aboral direction in which shock takes effect is..the same as that of easiest spread.

1931 Amer. Jrnl. Surg. 13 503/1 The aboral end of the ileum is gangrenous and sharply demarcated.

1983 G. T. Keusch in L. C. Chen & N. S. Scrimshaw Diarrhea & Malnutrition iii. 61 Any alteration of motility that affects the efficient aboral propulsion of intestinal contents can lead to local stasis and bacterial proliferation.

2006 Vet. Microbiol. 116 331/2 The mucosa of the aboral portion of the duodenum was dull grey and appeared flattened.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).

单词	aboral
释义	aboraladj. Brit. /abˈɔːrəl/, /abˈɔːrl̩/, U.S. /æbˈɔrəl/ Origin: Formed within English, by derivation. Etymons: ab- prefix, oral adj. Etymology: < ab- prefix + oral adj. 1. Zoology. Designating, situated on, or relating to the side, end, or surface of an animal's body that is furthest from the mouth, especially in forms (as some echinoderms) which do not have clear upper and lower sides or anterior and posterior ends. Cf. adoral adj. ΘΚΠ the world > animals > animal body > general parts > [adjective] > relating to region at opposite end from mouth aboral1857 1857 L. J. R. Agassiz Contrib. Nat. Hist. U.S.A. IV. 376 I have called this side [of radiate animals] the oral or actinal area, and the opposite side the aboral or abactinal area. 1878 A. Macalister Zool. Invertebr. Animals 56 The intestine..ends in a small aboral sac or cloaca. 1906 S. J. Hickson in Cambr. Nat. Hist. I. xiv. 386 The calicoblasts form..a skeletal plate at the aboral end of the coral embryo. 1962 D. Nichols Echinoderms v. 66 In the urchin immediately after metamorphosis the whole of the aboral surface is covered by an apical disk of plates. 2004 R. Dawkins Ancestor's Tale 349 Cnidarians..don't have an anterior/posterior axis, nor a dorsal/ventral one. They have an oral/aboral (mouth versus opposite-to-mouth) axis. 2. Medicine. = aborad adj. ΚΠ 1898 Philos. Trans. (Royal Soc.) B. 190 135 The downward, posterior, aboral direction in which shock takes effect is..the same as that of easiest spread. 1931 Amer. Jrnl. Surg. 13 503/1 The aboral end of the ileum is gangrenous and sharply demarcated. 1983 G. T. Keusch in L. C. Chen & N. S. Scrimshaw Diarrhea & Malnutrition iii. 61 Any alteration of motility that affects the efficient aboral propulsion of intestinal contents can lead to local stasis and bacterial proliferation. 2006 Vet. Microbiol. 116 331/2 The mucosa of the aboral portion of the duodenum was dull grey and appeared flattened. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < adj.1857
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