Each of three isomeric radicals derived from pyridine by the removal of a hydrogen atom. Usually attributive or as a formative element in chemical names.
Origin
Late 19th century; earliest use found in Journal of the Chemical Society. From pyrid- + -yl.
Definition of pyridyl in US English:
pyridyl
noun
Chemistry
Each of three isomeric radicals derived from pyridine by the removal of a hydrogen atom. Usually attributive or as a formative element in chemical names.
Origin
Late 19th century; earliest use found in Journal of the Chemical Society. From pyrid- + -yl.