Subumbonal definitions

Subumbonal

• (a.) Beneath or forward of the umbos of a bivalve shell.
Found on http://thinkexist.com/dictionary/meaning/subumbonal/

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Subumbonal

Sub`um·bo'nal adjective (Zoology) Beneath or forward of the umbos of a bivalve shell.
Found on http://www.encyclo.co.uk/webster/S/230

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