rare. [f. L. sulcāre SULCATE v.: see -ATION.]

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  1.  Furrowing, grooving.

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1658.  Phillips, Sulcation, a making furrows.

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  2.  A sulcus or set of sulci.

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1852.  Dana, Crust., II. 856. The sculpturing of the male being represented in the female by merely a few faint sulcations.

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