(Chiefly in plural) a permanent incisor tooth, often in the middle of the upper set, with a narrow and sometimes notched biting edge, often identified in children and indicative of congenital syphilis.
Origin
Late 19th century; earliest use found in The British Medical Journal.
Definition of screwdriver tooth in US English:
screwdriver tooth
noun
(Chiefly in plural) a permanent incisor tooth, often in the middle of the upper set, with a narrow and sometimes notched biting edge, often identified in children and indicative of congenital syphilis.
Origin
Late 19th century; earliest use found in The British Medical Journal.