concaveness
Bowl-like surface quality
Concaveness is the quality of curving inward, like the inside of a bowl or a spoon's scooping surface.
The term is interchangeable with concavity, though concavity appears more often in technical contexts: The concaveness of the lens focuses light to a single point.
Deviation from flatness
- hollownessState of being empty inside
- inwardnessState of being internal
- depressionProlonged low state
- dipBrief immersion or condiment
scoop · indentation · cavity · basin · trough · arc · crescent · sinkage
Empty within
- craterImpact or volcanic basin
- pitFruit's hard seed
- grooveNarrow cut or routine
- dentShallow surface depression
dimple · sinkhole · excavation · gouge · notch · furrow · channel · recess
Curved spanning structure
- socketHollow receiving cavity
- fossaAnatomical depression or hollow
- cavityEmpty space within
- orbitalRevolving around another
palate · lumbar · thoracic · sternum · pelvis · glenoid · sulcus · fontanelle
Light-focusing curved glass
- mirrorReflective viewing surface
- reflectionReturned light or thought
- divergenceSeparation from common origin
- magnificationDegree of visual enlargement
refraction · optics · telescope · eyeglass · corrective · meniscus · spectacle · reflector
Center-to-perimeter distance
- parabolicShaped like a conic section
- ellipticalOval-shaped or indirect
- sphericalGlobe-like in form
- hyperbolicExaggerated beyond reason
depth · vertex · axis · asymmetry · cross-section · profile · contour · cusp
curvature
Deviation from flatness
- hollownessState of being empty inside
- inwardnessState of being internal
- depressionProlonged low state
dip · scoop · indentation · cavity · basin · trough · arc · crescent · sinkage · inflection
hollow
Empty within
dent · dimple · sinkhole · excavation · gouge · notch · furrow · channel · recess · alcove
arch
Curved spanning structure
orbital · palate · lumbar · thoracic · sternum · pelvis · glenoid · sulcus · fontanelle · cranial
lens
Light-focusing curved glass
- mirrorReflective viewing surface
- reflectionReturned light or thought
- divergenceSeparation from common origin
magnification · refraction · optics · telescope · eyeglass · corrective · meniscus · spectacle · reflector
radius
Center-to-perimeter distance
- parabolicShaped like a conic section
- ellipticalOval-shaped or indirect
- sphericalGlobe-like in form
hyperbolic · depth · vertex · axis · asymmetry · cross-section · profile · contour · cusp · tangent
concavenessconvexity
Outward-curving quality
convexness · bulginess · protuberance · bulging · bulge
concave, concavity, concaved, concavities, concaves, concavely