A furrow; a groove; a fissure.
Latin = a groove.
An infolding, or groove, in the cortical surface. A sulcus separates neighboring gyri.
A linear groove on a sclerite that was derived secondarily for a functional reason; often used synonymously with suture because of uncertain homology.
A space or trough lined by mucous membrane.
A normally occurring space surrounding a healthy tooth, just below the gumline. It has a depth of 1-3mm.
The space between the free gingival and the tooth, having a depth of 1-3mm.
The normal space found between the gum and tooth Tartar: The common term for dental calculus