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Concave
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Meaning
Adj
●
Curved like the
inner
surface
of a
sphere
or bowl.
●
In Geometry:
Not
convex
;
having at
least
one
internal angle
greater than
180 degrees.
●
In Functional analysis:
Satisfying the
property
that all
segments
connecting
two points
on the function's
graph
lie
below the function.
●
Hollow; empty.
Noun
●
A
concave
surface
or curve.
●
The
vault
of the sky.
●
One of the
celestial spheres
of the Ptolemaic or
geocentric
model of the world.
●
In Manufacturing:
An
element
of a
curved
grid
used to
separate
desirable
material
from
tailings
or
chaff
in
mining
and harvesting.
●
In Surfing:
An
indentation
running along
the
base
of a
surfboard
,
intended
to increase lift.
●
In Skateboarding:
An
indented
area on the
top
of a
skateboard
,
providing
a
position
for
foot
placement
and
increasing
board
strength.
●
In Gambling:
A
playing card
made
concave
for use in cheating.
Verb
●
To
render
concave
, or increase the
degree
of concavity.
Sourced from
Wiktionary
Origin
concave
English
concavus
Latin
cavus
Latin
con-
Latin
cum
Latin
Sourced from
Etym
Antonyms
Convex
Related
Curved
Curvature
Curve
Contoured
Sloping
Angled
Cone
Parabolic
Conical
Recessed
Sloped
Cylindrical
Ridged
Chamfers
Flat
Rectangular
Circular
Oval
Triangular
Beveled
Conic
Parabola
Semicircular
Horizontal
Spherical
Linear
Grooved
Inverted
Vertical
Elliptical
Tapered
Reflector
Symmetrical
Perpendicular
Straight
Posterior
Rectangle
Curves
Notch
Elongated
Serrated
Contour
Surface
Tangent
Transverse
Edges
Flattened
Rib
More
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