'C5H4N' definitions:
Definition of '
C5H4N
'
From:
GCIDE
Pyridyl \Pyr"i*dyl\, n. [Pyridine + -yl.] (Chem.) A hypothetical radical, C5H4N, regarded as the essential residue of pyridine, and analogous to phenyl. [1913 Webster]
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