Multivalued vs Arcsine - What's the difference?

As an adjective multivalued

is of a function, associating one or more values of its range with each value of its domain.

As a noun arcsine is

any of several single-valued or multivalued functions that are inverses of the sine function. Symbol: arcsin, sin^{-1

multivalued English
Adjective
(mathematics) Of a function, associating one or more values of its range with each value of its domain.
The inverse sine function is multivalued unless it is restricted to a suitable range.
Antonyms
* single-valued
arcsine English
Noun
(en noun)
(trigonometry) Any of several single-valued or multivalued functions that are inverses of the sine function. Symbol: arcsin, sin^-1
Synonyms
* inverse sine
See also
* ("arcsine" on Wikipedia)
Anagrams
*
*}