half-ray
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
.