### Ellipsoid

The type of reflector used in many profile spots. Often used in America now to refer to all profile spotlights. The reflector is formed in a regular oval shape.

Mathematical literature often uses `ellipsoid` in place of `tri-axial ellipsoid`. Scientific literature (particularly geodesy) often uses `ellipsoid` in place of `ellipsoid of revolution` and only applies the adjective `tri-axial` when treating the general case. Older literature uses `spheroid` in place of `ellipsoid of revolution`. ...

Found on http://en.wikipedia.org/wiki/Ellipsoid

• (a.) Alt. of Ellipsoidal • (n.) A solid, all plane sections of which are ellipses or circles. See Conoid, n., 2 (a).

Found on http://thinkexist.com/dictionary/meaning/ellipsoid/

<geometry> A solid, all plane sections of which are ellipses or circles. See Conoid, 2 . ... The ellipsoid has three principal plane sections, a, b, and c, each at right angles to the other two, and each dividing the solid into two equal and symmetrical parts. The lines of meeting of these principal sections are the axes, or principal diamete...

Found on http://www.encyclo.co.uk/local/20973

ellipsoidal *adjective* in the form of an ellipse

Found on https://www.encyclo.co.uk/local/20974

El·lip'soid noun [ Ellipse + -oid : confer French ellipsoide .] (Geom.) A solid, all plane sections of which are ellipses or circles. See Conoid , noun , 2 (a) . » The ellipsoid has three principal plane sections, a ,

Found on http://www.encyclo.co.uk/webster/E/22

a 3-dimensional shape, elliptical in all sections through the long-axis.

Found on http://en.wikipedia.org/wiki/Glossary_of_botanical_terms

a 3-dimensional shape; elliptic in outline and with a length:breadth ratio between 3:2 and 2:1. cf. narrowly, broadly

Found on http://florabase.dpaw.wa.gov.au/help/glossary

a compressed sphere

Found on http://www.orchidspecies.com/glossary.htm

a compressed sphere

Found on http://orchidfetish.com/glossary.html

A quadratic surface that is the three-dimensional analog of an ellipse. The general equation of an ellipsoid in Cartesian coordinates is x

^{2}/a

^{2} + y

^{2}/b

^{2} + z

^{2}/c

^{2} ...

Found on http://www.daviddarling.info/encyclopedia/E/ellipsoid.html

A solid whose plane sections are all ellipses (closed curves produced when a cone is cut obliquely to its axis by a plane).

Found on https://www.xrite.com/learning/other-resources/glossary

Centered at c, this is the set E(c,Q)={x: (x-c)'Q–1(x-c)

Found on http://glossary.computing.society.informs.org/index.php?page=E.html

closed surface of which all plane cross sections are either ellipses or circles. An ellipsoid is symmetrical about three mutually perpendicular axes ... [1 related articles]

Found on http://www.britannica.com/eb/a-z/e/23

Describing a solid object which is elliptic in outline.

Found on http://www.encyclo.co.uk/local/22034

ellipsoid A geometric surface or a solid figure shaped like an oval. Any section through an ellipsoic is either an ellipse or a circle; oval-shaped.

Found on http://www.wordinfo.info/words/index/info/view_unit/1194/

Having every plane section an ellipse or a circle.

Found on http://ppathw3.cals.cornell.edu/glossary/Defs_E.htm

Referring to a solid object that is broadest at the middle, gradually tapering to both ends.

Found on http://www.encyclo.co.uk/local/22037

Referring to a solid object that is broadest at the middle, gradually tapering to both ends.

Found on http://www.encyclo.co.uk/local/22038

Spindle-shaped in three dimensions, tapering to each end.

Found on http://www.anbg.gov.au/cpbr/cd-keys/orchidkey/html/glossary.html

Type: Term Pronunciation: ē-lip′soyd Definitions: 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. Havi...

Found on http://www.medilexicon.com/medicaldictionary.php?t=28444

[

*adj]* - in the form of an ellipse 2. [n] - a surface whose plane sections are all ellipses or circles

Found on http://www.webdictionary.co.uk/definition.php?query=ellipsoid

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