Noun
English Wikipedia has an article on:ovalityWikipedia
ovality (countable and uncountable, plural ovalities)
(engineering) a measurement of deviation from circularity of an oval or approximately elliptical shape.
Alternatively, ovality of the core or cladding may be specified by a tolerance field consisting of two concentric circles, within which the cross section boundaries must lie. Source: Internet
The dimensionless quantity so obtained may be multiplied by 100 to express ovality as a percentage. Source: Internet