Half-ray n. : A straight line considered as drawn from a center to an indefinite distance in one direction, the complete ray being the whole line drawn to an indefinite distance in both directions.

Example:


Taxonomy
Episode, ray, Drama TV, Dictionary, straight line, one direction, flag, Roger Miller, Dallas, Unanswered questions, Ray Charles, Ray Martin, Ray Charles Singers, Webster 1913, Search, Patrick J. Cassidy, Reference library, Ferrante & Teicher.

Defination from the web:
Half·-ray n. (-rā`) (Geom.) A straight line considered as drawn from a center to an indefinite distance in one direction, the complete ... ray. Season 06: Dallas (TV Episode) (1982 Drama TV Episode) Season 10: Dallas (TV Episode) (1986 Drama TV Episode) ...