a.1.Having the figure of a half circle; forming a semicircle.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Annular pancreas and semiannular pancreas may also be observed in PS (3, 4).
There are six pairs of moving blades 14 on the side disks 3, which are kinematically connected to the semiannular profile cam 15 mounted on the press frame.