Mid 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Propargylpropargyl (the English word is first attested slightly later) + -ic.
Definition of propargylic in US English:
propargylic
adjectiveˌprəʊpɑːˈdʒɪlɪk
Chemistry
Of or containing propargyl.
Origin
Mid 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Propargyl propargyl (the English word is first attested slightly later) + -ic.