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Definition of Nasmyth's membrane in US English:

Nasmyth's membrane

noun

Anatomy

  • A transient membrane covering the crown of a newly erupted tooth; the primary enamel cuticle.

Origin

Mid 19th century; earliest use found in Quarterly Journal of Microscopical Science. From the genitive of the name of Alexander Nasmyth (d. 1848), British dentist, who described the membrane in 1839 + membrane.

Pronunciation

Nasmyth's membrane

/ˌneɪsmɪθs ˈmɛmbreɪn/