The Collaborative International Dictionary
Dignotion
Dignotion \Dig*no"tion\, n. [L. dignoscere to distinguish; di- =
dis- + gnoscere, noscere, to learn to know.]
Distinguishing mark; diagnostic. [Obs.]
--Sir T. Browne.
Wiktionary
dignotion
n. (context obsolete English) distinguishing mark; diagnostic