actinal

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[Footnote: When reference is made to the whole structure, including the internal organs as well as the solid parts of the surface, the terms _actinal_ and _ab-actinal_ are preferable to oral and ab-oral.] [Illustration: Sea-Urchin seen from the oral side, showing the zones with the spines and suckers; for the ab-oral side, on the summit of which the zones unite, see February Number, p. 216.]

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Definitions (5)

Toggle American Heritage definitions American Heritage Dictionary (1)

  1. adjective Of, relating to, or located on the part of a radially symmetric animal from which the tentacles radiate or the side where the oral area is found.

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Examples (2)

  • [Footnote: When reference is made to the whole structure, including the internal organs as well as the solid parts of the surface, the terms actinal and ab-actinal are preferable to oral and ab-oral Illustration: Sea-Urchin seen from the oral side, showing the zones with the spines and suckers; for the ab-oral side, on the summit of which the zones unite, see February Number, p. 216 The whole surface of the animal is divided by zones,--ten in number, five broader ones alternating with five narrower ones. —  The Atlantic Monthly, Volume 10, No. 57, July, 1862
  • [Footnote: When reference is made to the whole structure, including the internal organs as well as the solid parts of the surface, the terms _actinal_ and _ab-actinal_ are preferable to oral and ab-oral.] [Illustration: Sea-Urchin seen from the oral side, showing the zones with the spines and suckers; for the ab-oral side, on the summit of which the zones unite, see February Number, p. 216.] —  The Atlantic Monthly, Volume 10, No. 57, July, 1862
 

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Etymologies (1)

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  1. from Greek ἀκτίς (ἀκτιν-), a ray, + -al.
 

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/ˈæktɪnəl/
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