American Heritage Dictionary
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Century Dictionary
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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 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

Century Dictionary (1)
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