noun
canine tooth; cuspid
Refers to the pointed tooth between the incisors and premolars. The term is used in everyday contexts, while 犬歯 is the formal anatomical term.
See also: 犬歯
糸切り歯が痛くて、歯医者に行った。
My canine tooth hurt, so I went to the dentist.
彼は笑うと糸切り歯がよく見える。
When he laughs, his canine teeth are clearly visible.
犬歯 is the formal anatomical term for 'canine tooth', while 糸切り歯 is the common, everyday word.
The word 糸切り歯 literally means 'thread-cutting tooth', likely from the tooth's pointed shape resembling a tool used to cut thread. The exact historical derivation is uncertain.