Noun
English Wikipedia has an article on:orientabilityWikipedia
orientability (countable and uncountable, plural orientabilities)
The condition of being orientable
Similarly, the notion of orientability of a polyhedron is insufficient to characterise the surface twistings of toroidal 4-polytopes, and this led to the use of torsion coefficients. Source: Internet
For a complete list of the Greek numeral prefixes see Numeral prefixes>Table of number prefixes in English>Greek>Quantitative Topological characteristics The topological class of a polyhedron is defined by its Euler characteristic and orientability. Source: Internet