semiround

sem·i·round

 (sĕm′ē-round′, sĕm′ī-)
adj.
Having a round side and a flat side.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

semiround

(ˌsɛmɪˈraʊnd)
n
(Mathematics) a semiround object or shape
adj
(Mathematics) with one flat side and one round side; having the shape of half a circle; semicircular
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Made of finely cut coral stones, the church was originally cruciform with one main nave and short, semiround transepts.
The 2-ounce size is semiround and flat so it slides smoothly across the bottom, but puffs up enough sand to grab attention.
Grit particles are angular because they are produced by crushing round and semiround particles.
Mortar had a hollow structure, containing rounded, semirounded, and/or cornered but mostly long and flat grains, from silt size approaching to diameter of 1 cm, especially in such colors of white, cream, black, dark, and reddish brown.
The combination of M-sand and QD might tend to create voids due to the combination of semirounded particles and the sharp angular particles.
The powder mainly consisted of prismatic particles with a semirounded shape and nanosize dimensions of about 200 nm.
* If sediment is poorly sorted to moderately sorted, and grain size medium then the grain shape is semiangular to semirounded;
* If sediment is moderately well sorted to well sorted, and grain size very coarse or coarser then the grain shape is semiangular to semirounded;
The pictures showed that the lander came to rest in a rocky, undulating desert of semirounded boulders and pebbles, some of which appear to be stacked in preferential directions as if piled up by rushing waters.