Main Entry: ma·te·ria al·ba Pronunciation: m&-"tir-E-&-'al-b& Function: noun plural : a soft whitish deposit of epithelialcells, white blood cells, and microorganisms especially at the gumline
materia alba ma·te·ri·a al·ba (mə-tēr'ē-ə āl'bə) n. A white cheeselike accumulation of food debris, microorganisms, desquamated epithelial cells, and blood cells deposited around the teeth at the gumline.
