As an adjective polyynyl
is (organic chemistry) relating to, or derived from a polyyne.
As a noun polyenyl is
(organic chemistry|especially in combination) any radical derived from a polyene.
polyynyl
English
Adjective
(-)
(organic chemistry) relating to, or derived from a polyyne polyenyl
English
Noun
(
en noun)
(organic chemistry, especially in combination) Any radical derived from a polyene