codirections

Noun

codirection (countable and uncountable, plural codirections)

1. (uncountable) The joint direction of a film, organization, venture, etc.
   • Under the first of these, 5 collaborative research training fellowship projects were approved, on the following topics: stages of expansion of the railroads in Peru and their impact on its economy, under codirection of Heraclio Bonilla, Institute of Peruvian Sudies, Lima, and Marcello Carmagani...1968, Annual Report - Social Science Research Council, page 41
2. (countable) An equation for a hyperplane in the tangent space modulo a factor that is a positive constant; cotangent direction.
   • It can be shown that the set of hyperbolic codirections consists of distinct pairs of oppositely-directed convex cones.2003, Krishan L. Duggal, Ramesh Sharma, Recent Advances in Riemannian and Lorentzian Geometries, page 80
3. (uncountable) Colinearity.