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Wiktionary

sulcation

n. 1 A channel or furrow. 2 marking resembling channels or furrows, especially in shells, fossils, etc. 3 (context neuroscience English) The development of or resulting formations of sulcus in a brain cortex.

The Collaborative International Dictionary

Sulcation

Sulcation \Sul*ca"tion\, n. A channel or furrow.