- omphalous
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adj. [Gr. omphalos, the navel](MOLLUSCA: Gastropoda)Having a shell with an umbilicus.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.