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in deciduous teeth, a line of demarcation between prenatal and postnatal enamel.
Synonym(s): neonatal ring
A prominent incremental line in the tooth enamel and dentine made partly after birth. Its existence indicates that the infant survived for at least a few days after birth.
See also: line
ne·o·na·tal line(nēō-nātăl līn)
In deciduous teeth, line of demarcation between prenatal and postnatal enamel.