- semicircular in cross section, as a molding or piece of type.
- anything that is semicircular in cross section.
- Printing. a curved stereotype plate.
Origin of half-round
First recorded in 1655–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for half-round
Round iron or half-round iron should not be used, as these are liable to skid.The Boy Mechanic, Book 2
The seat battens are half-round in section, and are cut from 3-in.Rustic Carpentry
Paul N. Hasluck
The curves may be finished with half-round file or sandpaper.Manual Training Toys for the Boy's Workshop
Harris W. Moore
Taps for other metal have also been made of half-round section.
The mounted maps are glued and tacked to the half-round rollers.Practical Bookbinding