də̇ˌrekshəˈnaləd.ē, (ˌ)dīˌ- noun
( -es )
1. : the property of directional selectivity or precision
a scintillation counter was devised in such a fashion as to give a directionality of fifteen degrees and adequate sensitivity — Surgical Forum
2. : maintenance of direction
among these properties is that of directionality — C.K.Kluckhohn