abactinal

English

Etymology

Etymology tree

Proto-Indo-European *h₂ep

Proto-Indo-European *-o

Proto-Indo-European *h₂epó

Proto-Italic *ap

Latin abder.

Latin ab-bor.

English ab-

English actinal

English abactinal

From ab- + actinal.

Pronunciation

• (General American) IPA^(key): /æˈbæk.tə.nl̩/, /ˈæˌbæk.tə.nl̩/, /ˌæˌbækˈtaɪ.nl̩/, /ˈæˌbækˌtaɪ.nl̩/

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Adjective

abactinal

1. (zoology) Pertaining to the surface or end opposite to the mouth in a radiate animal.

   Antonym: actinal

   • 1857, Louis Agassiz, Contributions to Natural History, volume 4, page 376:

     The so-called mouth is always placed at one end of these poles, and from it radiate the most prominent organs, in consequence of which I have called this side of the body the oral or actinal area, and the opposite side the aboral or abactinal area.

2. (zoology) Pertaining specifically to the echinoderm body, that part not bearing tube feet, in which appears the madreporite.
   • 2020, Ubagan MD et al., A new species of the genus Henricia (Asteroidea, Spinulosida, Echinasteridae) from South Korea, Zookeys (Pensoft), pages 1–15, →DOI:

     This new species has very peculiar abactinal spines that form a hooked crown and can be compared with the robust, coarse abactinal spines of H. compacta, H. leviuscula, H. skorikovi.

Synonyms

• abambulacral

Derived terms

• abactinally

Translations

pertaining to the surface or end opposite to the mouth in a radiate animal

• Dutch: abactinaal
• Indonesian: abaktinal (id)
• Manx: gyn goullyn
• Portuguese: abactinal (pt)

Further reading

abactinal on Wikidata.Wikidata

Portuguese

Pronunciation

• (Brazil) IPA^(key): /a.ba.ki.t͡ʃiˈnaw/ [a.ba.ki.t͡ʃiˈnaʊ̯], /a.bak.t͡ʃiˈnaw/ [a.bak.t͡ʃiˈnaʊ̯]

 

• (Portugal) IPA^(key): /ɐ.bɐk.tiˈnal/ [ɐ.βɐk.tiˈnaɫ]

• (Portugal) IPA^(key): /ɐ.bɐk.tiˈnal/ [ɐ.βɐk.tiˈnaɫ]
  • (Southern Portugal) IPA^(key): /ɐ.bɐk.tiˈna.li/

• Hyphenation: a‧bac‧ti‧nal

Adjective

abactinal m or f (plural abactinais)

1. (zoology) abactinal (pertaining to the surface or end opposite to the mouth in a radiate animal)

Spanish

Pronunciation

• IPA^(key): /abaɡtiˈnal/ [a.β̞aɣ̞.t̪iˈnal]
• Rhymes: -al
• Syllabification: a‧bac‧ti‧nal

Adjective

abactinal m or f (masculine and feminine plural abactinales)

1. abactinal