half-ray
التعريفات والمعاني
== English ==
=== Etymology ===
From half- + ray.
=== Noun ===
half-ray (plural half-rays)
(geometry) A ray, or half-line.
=== References ===
“half-ray”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.