ellipsoid

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ellipsoid

a geometric surface, symmetrical about the three coordinate axes, whose plane sections are ellipses or circles. Standard equation: x2/a2 + y2/b2 + z2/c2 = 1, where ?a, ?b, ?c are the intercepts on the x-, y-, and z- axes

ellipsoid

(i-lip -soid) A surface or solid whose plane sections are circles or ellipses. An ellipse rotated about its major or minor axis is a particular type of ellipsoid, called a prolate spheroid (major axis) or an oblate spheroid (minor axis).

Ellipsoid

 

a closed central quadric surface. An ellipsoid has a center of symmetry O (see Figure 1) and three axes of symmetry, which are called the axes of the ellipsoid. The plane sections of

Figure 1

ellipsoids are ellipses; in particular, one can always find a plane section that is a circle. In a suitable coordinate system the equation of an ellipsoid has the form

ellipsoid

[ə′lip‚sȯid]
(mathematics)
A surface whose intersection with every plane is an ellipse (or circle).
References in periodicals archive ?
(a) (A) The control group showed strong AR immunostaining in the Sertoli, Leydig, and peritubular myoid cells.
Myoid Angioendothelioma of the Spleen: A Rare Case Report and Literature Review.
(46,47) This, in turn, can alter the paracrine communication between Leydig cells, myoid cells and Sertoli cells, altering spermatogenesis.
In 1998, Granter et al established the concept of neoplasms characterized by perivascular myoid differentiation.
The testicular suspension isolated from seminiferous tubules is often contaminated by differentiating spermatogonial cells, Sertoli cells, Leydig cells and peritubular myoid cells (11), (13).
Reduced nuclear expression of androgen receptors was observed in Leydig cells, Sertoli cells, and myoid cells from rats fed gossypol-rich cottonseed flour [132].
Obviously, the basement membrane of testicular cord containing male germ cells as well as other somatic cells (i.e., Sertoli cells and peritubular myoid cells) is well demarcated by Mallory-AZAN due to the underlying connective tissue which was stained deep blue (Figure 4(h)).
The third feature was small, round hyperreflective points located in the ganglion cell layer, the outer nuclear layer, the myoid zone, and the choriocapillaris (Figure 3).
Chioccarelli et al., "Estrogen regulation of the male reproductive tract in the frog, Rana esculenta: a role in Fra-1 activation in peritubular myoid cells and in sperm release," General and Comparative Endocrinology, vol.
Two cases reported as spindle cell sarcomas were refined at our centre to spindle cell sarcomas with myoid differentiation.
Interspersed between the whorls of eosinophilic myoid cells are more cellular areas of primitive rounded, polygonal, or somewhat spindled shaped cells.
But consequently, because I was finishing high school, and at the same time trying to make money for living as a tennis teacher in myoId club, I fell under all the weights that fall upon the head of a desperately, and maybe a little naively, but most truthfully, searching teenager amidst of our irri rational society.