The Collaborative International Dictionary
Irroration
Irroration \Ir`ro*ra"tion\, n. [Cf. F. irroration.]
The act of bedewing; the state of being moistened with dew.
[Obs.]
--Chambers.
Wiktionary
irroration
n. (context obsolete English) The act of bedewing; the state of being moistened with dew.