Crown-saw
Pronunciation : Crown"-saw` (-s`)
Part of Speech : n.
Etymology : [From its supposed resemblance to a crown.] (Mech.)
Definition : Defn: A saw in the form of a hollow cylinder, with teeth on the end or edge, and operated by a rotative motion.
Note: The trephine was the first of the class of crownsaws. Knight.
Source : Webster's Unabridged Dictionary, 1913