SINCE 1828
sheath of Hertwig
noun
sheath of Hert·wig
| \ -ˈhert-ˌvig
\
\
Medical Definition of sheath of Hertwig
: a two-layered epithelial wall that covers the developing root of a tooth, is derived from cells of the enamel organ, and later breaks up during the process of cement deposition
— called also Hertwig's sheath
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