ellipsoid

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el·lip·soid

(ē-lip'soyd),
1. A spheric or spindle-shaped condensation of phagocytic macrophages in a reticular stroma investing the wall of the splenic arterial capillaries shortly before they release their blood in the cords of red pulp.
2. The outer end of the inner segment of the retinal rods and cones.
3. Having the shape of an ellipse or oval.
[G. ellips, oval, + eidos, form]

Schweigger-Seidel,

Franz, German physiologist, 1834-1871.
sheath of Schweigger-Seidel - (1) a spherical or spindle-shaped condensation of phagocytic macrophages in a reticular stroma investing the wall of the splenic arterial capillaries; - (2) the outer end of the inner segment of the retinal rods and cones. Synonym(s): ellipsoid

ellipsoid

1. The refractile outer portion of the inner member of a rod or cone cell. It is located between the myoid and the outer member of the cell, and contains mitochondria. The myoid is in contact with the external limiting membrane of the retina while the outer member is next to the pigment epithelium. 2. Surface of revolution generated by rotating an ellipse about a major or minor axis.

el·lip·soid

, ellipsoidal (ē-lip'soyd, -al)
Spheric or spindle-shaped condensation of phagocytic macrophages in a reticular stroma investing wall of splenic arterial capillaries shortly before they release their blood in red pulp cords.
[G. ellips, oval, + eidos, form]
References in periodicals archive ?
A separation of the coordinates of the centre of mass of the H atom produces reduced mass p of the system that is distant r from the origin, to supplant distance r between the electron and the atomic nucleus at one centre of the ellipsoid in the limit of infinite nuclear mass.
The received set of unit vectors has a geometrical form of an ellipsoid with two axes (l (big axis) and m (small axis)), as it is shown on figure 1.
The geometric features of a sphere or an ellipsoid have the same characteristics: a fixed center, where the normal stress [[sigma].
An Improved Method of Continuous Collision Detection Using Ellipsoids.
The incomplete elliptic integral produced for the ellipsoid can be evaluated using the Maple EllipticE command.
for the self-potential inside and outside the ellipsoid respectively.
The depolarization factor in the x-direction for an ellipsoid with the semi-axis aligned with cartesian-axis is
The operation is somewhat more time-consuming than for the general ellipsoids (2), in that it is necessary to scan in a direction normal to the measurement plane to obtain a maximum, whereas for the ellipsoids the plane containing the origin would contain the RECIST diameter.
The ellipsoids showed marked concentration of carbon throughout the red pulp.
In order to compare the efficiency of the proposed method with the robust quadratic control, the volumes of ellipsoids derived via optimization over LMIs are presented in Table 1 (first row) [5].
A visual model of correspondingly loose packed ellipsoids obtained by HADES is plotted in Fig.
Conveniently, the World Geodetic System 1984 (WGS84) ellipsoid is associated with GNSS surveying since its definition has been developed over the years based on concerted efforts using combinations of VLBI, satellite/lunar laser and high precision GPS campaigns.