Definitions for "Ovoid"
Keywords:  ovate, eggshape, oval, egg, solid
A solid resembling an egg in shape.
solid form of oval
Shaped like a hen's egg.
An ovoid O of a (finite) polar space of rank r is a set of points, such that every subspace of rank r-1 intersects O in exactly one point.
Keywords:  collinear, prime, three, power, points
In PG(3,q), with q a prime power, an ovoid is a set of q^2+1 points, no three of which collinear.