advention

plural adventions

1. obsoleteAn external addition.

   Fourthly, we will note, that ſomtimes ſome Bodies conceive a burning without the advention of another fire, only by their own effervency, and by the inteſtine motion of the implanted Particles, and of their own accord are reduced into Aſhes ; […]

   1674, Thomas Willis, “Of the Nature of Fire: and by the way of Heat, and Light” (chapter X), in The Remaining Medical Works of That Famous and Renowned Physician Dr Thomas Willis, London: […] T. Dring; C. Harper; F. Leigh; S. Martyn, page 36

   2 more examples

   But the reaſon of that conſequence is, ſay they, becauſe mixts have thoſe qualities as they contain the Elements, either formally , as ſome aſſert, or virtually and eminently, as others, which in mixts are reduced into act, by the advention of the form of the mixt; […]

   1700, Henning Michael Herwig, “The Apendix”, in The Art of Curing Sympathetically or Magnetically, […] , London, page 107

   As likewiſe by Fulguration, and the ſad Light of her infernal Fires, which was another token of her Coming. Yet the Poets make the unuſual and ſudden Splendor of Flames to be a general Signal of the Advention of any of the Deities as well as of her.

   1702, Seneca the Younger, “Madea”, in Edward Sherburne, transl., The Tragedies of L. Annæus Seneca the Philosopher, London: […] S. Smith and B. Walford, page 85