apioidn.
/ˈeɪpɪɔɪd//ˈapɪɔɪd/ Geometry.
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a. A species of plane curve, being that one of a pair of Cartesian ovals which is within the other.
1898 [see apioidal adj. at Derivatives].
b. A species of solid of revolution, being the form assumed by a rotating liquid when the velocity of rotation exceeds a certain amount.
ΘΚΠ
the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > solid of revolution > other
catenoid1876
apioid1905
1905 A. M. Clerke Mod. Cosmogonies vi. 104 An ‘apioid’, or pear-shaped body, replaces the antecedent ellipsoid.
Derivatives
apiˈoidal adj. relating to or having the form of an apioid.
ΚΠ
1898 G. W. Myers in Astrophysical Jrnl. VIII. 163 The distance of centers does not materially differ from the sum of the radii of the components [of the star U Pegasi], suggesting the probable existence of the ‘apioidal’ form of Poincaré.
This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2018).
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