a. Ornith. [f. TOMI-UM + -AL.] Of or pertaining to the tomia or to a tomium.

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1872.  Coues, N. Amer. Birds, 30. ‘Commissural edge’ of either mandible (equivalent to ‘tomial edge’).

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1895.  Proc. Zool. Soc., 7 May, 369. The lamella of bone between each nostril and the tomial margin is relatively wider.

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