crown-saw
n. வாய்முகப்பில் பல்வரிசையுள்ள குழல் வடிவான வாள்.
Crown"-saw` (-s`), n. Etym: [From its supposed resemblance to a crown.] (Mech.) 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.