Difference between Concave and Bursiform

CONCAVE vs BURSIFORM: NOUN

A concave surface, structure, or line.
The vault or arch of heaven: as, “the blue concave.”
A playing card so trimmed that it can be separated from others according to the purpose for which the pack was prepared.
A hollow; an arch or vault; a concavity.
A concave mirror.
A hollow; an arched vault; a cavity; a recess.
A curved sheath or breasting for a revolving cylinder or roll.
An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
An indentation running along the base of a surfboard, intended to increase lift.
A concave surface or curve.
The vault of the sky.
One of the celestial spheres of the Ptolemaic or geocentric model of the world.
An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
Any inwardly curved portion of a machine: as, the concave of a thresher (the curved breast in which the cylinder works).

Curved like the inner surface of a sphere.
Curving inward
Hollow; void of contents.
Hollow and curved or rounded; vaulted; -- said of the interior of a curved surface or line, as of the curve of the of the inner surface of an eggshell, in opposition to convex.

To make hollow.
Curved or rounded in the manner of the circumference of a circle or the surface of a sphere when viewed from the center; presenting a hollow or incurvation; incurved; hence, bounded by such a line or surface: as, a concave mirror.
Hollow; empty.

Cupulate, Biconcave, Cotyloidal, Pouch shaped, Bursiform, Concavo concave, Concavo convex, Cotyloid, Cupular, Dish shaped, Cup shaped, Depressed, Recessed, Acetabular, Indented

Planoconcave, Dish shaped, Cupulate, Cupular, Cup shaped, Cotyloidal, Cotyloid, Concavo convex, Concavo concave, Bursiform, Biconcave, Depressed, Recessed, Acetabular, Indented

Formation by Concave Mirror, Various Cases on How Image formed by Concave Mirror, Numerical, Magnification or Lateral or Transverse Magnification.
In the logistic graph, the point of inflection can be seen as the point where the graph changes from concave up to concave down.
If the reflecting surface of a spherical mirror is concave, it is called a concave mirror.
This allows you to determine whether the motion is convex moving on concave, or concave moving on convex.
Concave mirror is used in the solar furnace, whereby the sun rays are focused at a point by the concave mirror.
One concave upward but decreasing, and the other concave upward and increasing.
Them to the ray diagrams concave mirror never forms an orientation of same size of students are given for concave mirror.
When looking at a quadratic equation, how do you know whether it will be concave up or concave down?
Concave: Concave design centers mill over fish and is less likely to sidetrack.
Label each of the following graphs as either concave up or concave down.