semicircular
Like a rainbow
Semicircular means shaped like half a circle: a semicircular driveway, the semicircular canals of the inner ear.
The prefix semi- indicates half, so anything arranged in an arc or curved like a half-moon can be described as semicircular.
Smoothly bent, not angular
- archedCurved overhead
- roundedHaving no sharp angles
- crescentCurved sickle-like arc
- bowedCurved or bent over
domed · vaulted · sweeping · concave · convex · bent · arcuate · lunate
Vaulted church recess
- vaultSecure storage chamber
- colonnadeRow supporting a roof
- porticoColumned covered entryway
- rotundaCircular domed chamber
dome · arcade · ambulatory · arch · amphitheater · cloister · niche · alcove
Dug water passage
- vestibularOf the balance organ
- labyrinthIntricate passage network
- inner earBalance and hearing center
- vestibuleEnclosed space between doors
balance · equilibrium · cochlea · auditory · sensory · vertigo · nystagmus · otolith
Curved line segment
- diameterDistance across through center
- radiusCenter-to-perimeter distance
- chordNotes sounded simultaneously
- sectorDistinct division of whole
circumference · central angle · protractor · compass · degrees · pi · radian · bisector
curved
Smoothly bent, not angular
bowed · domed · vaulted · sweeping · concave · convex · bent · arcuate · lunate · horseshoe
apse
Vaulted church recess
rotunda · dome · arcade · ambulatory · arch · amphitheater · cloister · niche · alcove · bay window
canal
Dug water passage
- vestibularOf the balance organ
- labyrinthIntricate passage network
- inner earBalance and hearing center
vestibule · balance · equilibrium · cochlea · auditory · sensory · vertigo · nystagmus · otolith · spatial orientation
arc
Curved line segment
- diameterDistance across through center
- radiusCenter-to-perimeter distance
- chordNotes sounded simultaneously
sector · circumference · central angle · protractor · compass · degrees · pi · radian · bisector · segment
- Semi- wordssemifinal, semicolon, semiconductor, semitruck, semiannual
semicircularstraight
Not curved or crooked
linear · rectilinear · angular · rectangular · square
- semicircular canalEar's rotation detector
circle, circular, encircle, circulation, semi, semicircle, circularity, hemispherical