Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Located opposite to or away from the mouth.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Situated opposite to, or away from, the mouth.

from The Century Dictionary and Cyclopedia

  • In anatomy, pertaining to or situated at the opposite extremity from the mouth: opposed to adoral.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. opposite to or away from the mouth

Etymologies

ab- (“away from”) +‎ oral (“the mouth”) (Wiktionary)

Examples

  • Duboc V, Rottinger E, Besnardeau L, Lepage T (2004) Nodal and BMP2 / 4 signaling organizes the oral-aboral axis of the sea urchin embryo.

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  • Clytia HOX9-14 group C gene CheHox9-14C, expressed at the aboral pole of the planula, is orthologous to

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  • Cross species comparison reveals a strong variability of gene expression along the oral-aboral axis and during the life cycle among cnidarian lineages.

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  • Transcripts are firstly detected in the unfertilised eggs in the whole cytoplasm but they are absent from the area surrounding the nucleus, corresponding to the animal pole and to the future aboral end of the polyp (figure 2A).

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  • In contrast, expression of "anterior" vs. "posterior" genes in different domains along the oral-aboral axis, potentially evoking trans-collinearity, has been reported in

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  • Among the 7 examined genes, only those belonging to the HOX9-14 and the CDX groups exhibit a restricted expression along the oral-aboral axis during development and in the planula larva, while the others are expressed in very specialised areas at the medusa stage.

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  • The Clytia HOX1 gene is not expressed along the oral-aboral axis but specifically in medusa sensory organs

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  • PcaCnox1 has an expression in the larva localised at the aboral pole in both the endoderm and the ectoderm

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  • They share a unique body plan with a single polarity axis (the oral-aboral axis) but exhibit various life cycles, comprising a pelagic (polyp) or a benthic form (medusa) or both alternating.

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  • However, the expression of these four Hox genes along the oral-aboral axis shows no evidence of cis-collinearity,

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