Origin of half-round
Examples from the Web for half-round
The round face of a half-round file requires eight, ten or more courses to complete it.
These half-round brass plates on the steps of the poop-ladders are beastly dangerous things!Tales Of Hearsay|Joseph Conrad
Round iron or half-round iron should not be used, as these are liable to skid.The Boy Mechanic, Book 2|Various
It is an endogenous plant, the stem of which is enclosed in layers of half-round petioles.The Philippine Islands|John Foreman
Brass finishers use square taper reamers, which produce upon brass more true work than the half-round reamer.Modern Machine-Shop Practice, Volumes I and II|Joshua Rose