adj · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
General-American:/æˈbæk.tə.nl̩/
General-American:/ˈæˌbæk.tə.nl̩/
General-American:/ˌæˌbækˈtaɪ.nl̩/
General-American:/ˈæˌbækˌtaɪ.nl̩/
Recorded audio is listed in the source snapshot.
1
adj
Meaning 1
Pertaining to the surface or end opposite to the mouth in a radiate animal.
Definition source: English Wiktionary via Wiktextract
Topics: biology, natural-sciences, zoology
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: actinal
2
adjective
Meaning 2
(of radiate animals) located on the surface or end opposite to that on which the mouth is situated
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: actinal
History
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.
Across languages
Translations
4 source translations are retained for this English entry.
Dutch:
abactinaal
— pertaining to the surface or end opposite to the mouth in a radiate animal
Indonesian:
abaktinal
— pertaining to the surface or end opposite to the mouth in a radiate animal
Manx:
gyn goullyn
— pertaining to the surface or end opposite to the mouth in a radiate animal
Portuguese:
abactinal
— pertaining to the surface or end opposite to the mouth in a radiate animal