Definition of Abactinal

1. Adjective. (of radiate animals) located on the surface or end opposite to that on which the mouth is situated.

Antonyms: Actinal

Definition of Abactinal

1. a. Pertaining to the surface or end opposite to the mouth in a radiate animal; -- opposed to actinal.

Definition of Abactinal

1. Adjective. (zoology) Pertaining to the surface or end opposite to the mouth in a radiate animal; -- opposed to ''actinal''. ¹

¹ Source: wiktionary.com

Medical Definition of Abactinal

1. Pertaining to the surface or end opposite to the mouth in a radiate animal; opposed to actinal. The aboral or abactinal area. Origin: L. Ab + E. Actinal. (19 Mar 1998)

Lexicographical Neighbors of Abactinal

abacination
abacinations
abacisci
abaciscus
abacist
abacists
aback
abacks
abackward
abacost
abacot
abacs
abacterial
abacterial thrombotic endocarditis
abacterially
abactinal (current term)
abactinally
abaction
abactor
abactors
abaculi
abaculus
abacus
abacuses
abada
abadas
abade
abaft
abafungin
abagovomab

Literary usage of Abactinal

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Cidaridae by Hubert Lyman Clark (1907)
"abactinal system large, .45-.5S hd; ... of numerous minute prickles but never thorny affinis abactinal system small, .40-.45 hd; areolae very shallow; ..."

2. A Treatise on Zoology by Edwin Ray Lankester (1900)
"Disc large ; rays comparatively short, thick, and blunt. No lateral spines. The abactinal skeleton consists of closely set, irregular, granular plates. ..."

3. ... Hawaiian and Other Pacific Echini by Alexander Agassiz, Hubert Lyman Clark (1914)
"abactinal surface of bare test of specimen (holotype) from Portsea, Victoria. X 6. 2. ... abactinal system of male, showing small genital pores. X 12. 6. ..."

4. Preliminary Report on the Ec̄hini by Alexander Agassiz (1898)
"... from the abactinal side, odd anterior ambulacrum on the left. Fig. 2. ... from the abactinal side. All figures natural size. PLATE X. Fig. 1. ..."

5. A Treatise on Comparative Embryology by Francis Maitland Balfour (1885)
"abactinal or dorsal surface of the future starfish. Close to its dorsal, ie embryonic dorsal, edge lies the dorsal pore of the water-vascular system ..."

6. Quarterly Journal of Microscopical Science edited by Biologists Limited, The Company of. (1879)
"But in the other Echinoderms the radial plates of the abactinal system, situated round the dorsal pole of the embryo, gradually extend towards the edge of ..."

7. ... Report on the Echini by Alexander Agassiz (1885)
"But in all the young stages, even when not measuring more than 1.5 mm. in diameter, the arrangement of the plates of the abactinal system does not ..."

8. Forms of Animal Life: A Manual of Comparative Anatomy : with Descriptions of by George Rolleston, William Hatchett Jackson (1888)
"In the fusion of the two sets of processes, abactinal and ... The abactinal processes, which correspond at their first appearance with the ..."

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