Aboral

opposite to or away from the mouth.
Historical Examples

An aboral vessel embraces the sense-organ, but has no external opening.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 Various

The pedal pores (on the base of the aboral feet) are usually larger than the dental pores (on the base of the circoral teeth).
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index Ernst Haeckel

The mouth of the shell lies on the oral pole of the main axis, and is therefore opposed to the aboral hinge.
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index Ernst Haeckel

Besides, a more solid junction is often effected on the posterior or aboral part of the margins, which we shall call the hinge.
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index Ernst Haeckel

In the next stage a small disc—the ciliated disc—is formed in the middle of the aboral dome.
The Works of Francis Maitland Balfour, Volume II (of 4) Francis Maitland Balfour

Ventral horn of the aboral hinge very large, pyramidal, one-third as long as the shell and three times as long as the dorsal.
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index Ernst Haeckel

The aboral end of the original body of the embryo gradually atrophies.
The Works of Francis Maitland Balfour, Volume II (of 4) Francis Maitland Balfour

Make a drawing of the aboral surface showing all these parts.
Elementary Zoology, Second Edition Vernon L. Kellogg

Shell ovate, slightly compressed, with a single straight conical spine on the aboral pole, half as long as the radius.
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index Ernst Haeckel

Now begin at the tip of each ray and cut away the aboral wall of each, leaving, however, a single arm intact.
Elementary Zoology, Second Edition Vernon L. Kellogg

adjective
(zoology) away from or opposite the mouth

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Aboriginally