antambulacraladj.

Brit.

/ˌantambjᵿˈleɪkr(ə)l/,

/ˌantambjᵿˈlakr(ə)l/, U.S.

/ˌæntæmbjəˈleɪkrəl/,

/ˌæntæmbjəˈlækrəl/

Forms:

α. 1800s– antiambulacral.

β. 1800s– antambulacral.

Origin: Formed within English, by derivation. Etymons: anti- prefix, ambulacral adj.

Etymology: < anti- prefix + ambulacral adj.

Zoology. Now rare.

Designating that general region of the body surface of an echinoderm that does not bear tube feet, considered in contrast to the ambulacral (and interambulacral) region.In some echinoderms, such as starfish and crinoids, the antambulacral zone corresponds to most or all of the aboral surface; in others, such as echinoids and holothurians, it is represented only by a small region at the apex.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > belonging to or resembling echinoderms > of parts of > of or relating to ambulacra > opposite to ambulacral

antambulacral1854

1854 Canad. Jrnl. June 273/1 True arms have an ambulacral and an antambulacral side.

1870 G. Rolleston Forms Animal Life 142 The antiambulacral surface.

1877 T. H. Huxley Man. Anat. Invertebrated Animals 553 [In a Starfish] the ambulacral, and the opposite, or antambulacral faces are of equal extent.

1946 H. Woods Palæontol. Invertebr. (ed. 8) 120 The two surfaces of the Asteroid are readily distinguishable... The upper surface (known as the apical, aboral, anti-ambulacral, or abactinal) is completely covered over.

This entry has been updated (OED Third Edition, March 2016; most recently modified version published online December 2021).

单词	antambulacral
释义	antambulacraladj. Brit. /ˌantambjᵿˈleɪkr(ə)l/, /ˌantambjᵿˈlakr(ə)l/, U.S. /ˌæntæmbjəˈleɪkrəl/, /ˌæntæmbjəˈlækrəl/ Forms: α. 1800s– antiambulacral. β. 1800s– antambulacral. Origin: Formed within English, by derivation. Etymons: anti- prefix, ambulacral adj. Etymology: < anti- prefix + ambulacral adj. Zoology. Now rare. Designating that general region of the body surface of an echinoderm that does not bear tube feet, considered in contrast to the ambulacral (and interambulacral) region.In some echinoderms, such as starfish and crinoids, the antambulacral zone corresponds to most or all of the aboral surface; in others, such as echinoids and holothurians, it is represented only by a small region at the apex. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > belonging to or resembling echinoderms > of parts of > of or relating to ambulacra > opposite to ambulacral antambulacral1854 1854 Canad. Jrnl. June 273/1 True arms have an ambulacral and an antambulacral side. 1870 G. Rolleston Forms Animal Life 142 The antiambulacral surface. 1877 T. H. Huxley Man. Anat. Invertebrated Animals 553 [In a Starfish] the ambulacral, and the opposite, or antambulacral faces are of equal extent. 1946 H. Woods Palæontol. Invertebr. (ed. 8) 120 The two surfaces of the Asteroid are readily distinguishable... The upper surface (known as the apical, aboral, anti-ambulacral, or abactinal) is completely covered over. This entry has been updated (OED Third Edition, March 2016; most recently modified version published online December 2021). < adj.1854
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