• Showing main oblong building and semicircular apse
    Showing main oblong building and semicircular apse
  • WordNet 3.6
    • adj semicircular curved into a half circle
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Additional illustrations & photos:

Segmental and Semicircular arches Segmental and Semicircular arches

Webster's Revised Unabridged Dictionary
    • a Semicircular Having the form of half of a circle.
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Century Dictionary and Cyclopedia
    • semicircular Having the form of a half-circle.
    • semicircular Specifically, in anatomy, noting the three canals of the internal ear, whatever their actual shape. They are usually horseshoe-shaped or oval, and sometimes quite irregular. See canal, and cuts under Crocodilia, ear, and periotic.
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In literature:

After passing through the gatehouse, they found themselves in a stone-paved semicircular courtyard.
"The Saracen: The Holy War" by Robert Shea
At the south it ends in a vast semicircular bay, sixty miles across, which is evidently a half-submerged mountain ring.
"Pleasures of the telescope" by Garrett Serviss
This is made by using a semicircular piece of heavy sheet brass and filing little notches in it.
"Boys' Book of Model Boats" by Raymond Francis Yates
Semicircular in outline, somewhat stipitate.
"The Mushroom, Edible and Otherwise" by M. E. Hard
At the Big Hockhocking River (197 miles), on a high, semicircular bottom, is Hockingport, a hamlet with a population of three hundred.
"Afloat on the Ohio" by Reuben Gold Thwaites
It was widest at the upper part, where it was semicircular, while the bottom was cut off straight.
"The Cat of Bubastes" by G. A. Henty
Each arm of the transept is entered by an external semicircular portico, reached by a lofty staircase.
"England, Picturesque and Descriptive" by Joel Cook
Naturally it prepares an entrance; the form of this is semicircular.
"The Industries of Animals" by Frédéric Houssay
The easterly end is the usual semicircular apse.
"The Cathedrals of Northern France" by Francis Miltoun
The cochlea and semicircular canals open into the vestibule.
"A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition)" by Calvin Cutter

In news:

A semicircular radiopacity lies anterior to the distal humerus on the lateral radiograph (Figure 1).
At the semicircular window over the old building's front door, he's scraped out the old glazing , painted the window frames " glazed it up" and painted it, he said.
The floor-to-ceiling windows in this semicircular nightspot that faces Common Street offer a 180-degree street-level view of the CBD.
From fossil humans to dinosaurs, researchers have often reconstructed the kind of head movements prehistoric animals were capable of by looking at the anatomy of semicircular canals within the ear.
Bilateral posterior semicircular canal dehiscence in the setting of Hallermann-Streiff syndrome.
Set into Cantina South's double front doors is a matched pair of large semicircular glass panes.
Link four end-to-end in a ring, or combine two to create a semicircular conversation piece.

In science:

We can give a linear-algebraic model of a pair of free random variables each of which has a semicircular distribution.
Three lectures on free probability
This is first carried out in the important special case where X, Y are semicircular random variables, then adapted to allow Y to have arbitrary distribution while X remains semicircular, and finally relaxed to allow X, Y to have arbitrary specified distributions.
Three lectures on free probability
Random matrix model of a free semicircular pair.
Three lectures on free probability
In this subsection we construct a random matrix model for a free semicircular pair X, Y .
Three lectures on free probability
Our matrix model for a free semicircular pair will be built out of complex Wigner matrices of a very special type: they will be GUE random matrices.
Three lectures on free probability