Sporangia globose or ovoid to ellipsoid or oblong, erect or sometimes inclined or even nodding.
Its form is that of an ellipsoid, with a major axis 26 millimetres in length, while the minor axis measures 11 millimetres.
Newton showed that an ellipsoid of revolution should differ from a sphere by a compression of 1/230.
The form of the latter is at first globular, then ellipsoid, and more or less curved.
Similarly, the dielectric constants of a non-conducting crystal may be expressed by a sphere, spheroid or ellipsoid.
ellipsoid, a surface bearing the same sort of relation to a spherical surface as an ellipse bears to a circle.
Of the two eggs, one is of an ovoid form, having much the shape of a hen's egg; and the other is an ellipsoid.
A surface expressing the optical relations of such crystals is thus an ellipsoid of revolution about the optic axis.
The longer axis of the ellipsoid bears to the shorter the proportion of 5 : 4.
Therefore the surface is an ellipsoid of revolution having A and B as foci.