noun
double tooth; protruding tooth (like a fang)
Rare term for a tooth that grows in front of or behind another, often resembling a fang; compare 八重歯 (やえば), which is the common word for a snaggletooth or overlapping canine.
See also: 八重歯 (やえば)
添い歯は、歯並びの異常の一種として扱われることがある。
A double tooth is sometimes treated as a type of dental irregularity.
彼女の添い歯が、笑うと少しだけ見える。
Her protruding tooth shows just a little when she smiles.
八重歯 is the common, everyday word for a snaggletooth or overlapping canine, while 添い歯 is a rare, more clinical term for a double or protruding tooth.
Compound of 添い (soi, 'accompanying') + 歯 (ba, 'tooth'), literally 'accompanying tooth'. The exact historical derivation is uncertain, but the term describes a tooth that appears alongside another.