concaves
Surfaces curving inward
Concaves is the plural of concave used as a noun, referring to surfaces or objects that curve inward like the inside of a bowl.
The term appears mainly in technical contexts—optics, architecture, skateboarding—where specific curved surfaces need naming: The concaves on this deck give better grip.
As an adjective, concave doesn't pluralize.
Bends in a line
- surfacesOuter layers or appears
- indentationsRecessed marks in surfaces
- hollowsSunken areas, indentations
- depressionsSunken areas or downturns
arcs · bowls · cavities · recesses · dished · scooped · crescent · parabolas
Secure storage rooms
- domesVaulted rounded ceilings
- nichesRecessed hollows or specialties
- alcovesRecessed wall spaces
- apsesVaulted church recesses
ceilings · cupolas · arches · recessed · coffered · shells · canopies · amphitheaters
Curved transparent refractors
- mirrorsReflective glass surfaces
- reflectorsSurfaces that bounce light
- curvatureDeviation from flatness
- focalOf a central point
parabolic · telescopes · spectacles · eyeglasses · magnifying · diverging · optics · prescription
curves
Bends in a line
- surfacesOuter layers or appears
- indentationsRecessed marks in surfaces
- hollowsSunken areas, indentations
depressions · arcs · bowls · cavities · recesses · dished · scooped · crescent · parabolas · elliptical
vaults
Secure storage rooms
apses · ceilings · cupolas · arches · recessed · coffered · shells · canopies · amphitheaters · acoustics
lenses
Curved transparent refractors
- mirrorsReflective glass surfaces
- reflectorsSurfaces that bounce light
- curvatureDeviation from flatness
focal · parabolic · telescopes · spectacles · eyeglasses · magnifying · diverging · optics · prescription · corrective
arches
Weight-bearing curved spans
spinal · lumbar · lordosis · kyphosis · temples · orbits · cheekbones · palate · sternum · sacrum
concavesbulges
Outward swellings or projections
protrudes · swells · domes · protrusions · convexities
concavesbulges
Outward swellings or projections
protuberances · protrusions · swells · bumps · flats
- concave lensesInward-curving light spreaders
- concave mirrorInward-curved reflecting surface
- concave lensInward-curving light disperser
concave, concavity, concaved, concavities, concavely, concaveness