whereon

where·on

 (wâr-ŏn′, -ôn′, hwâr-)
adv.
On which or what: "the ground whereon she trod" (John Milton)."After a hurried breakfast ... he ascended ... to the covered roof pasture whereon his electric sheep 'grazed'" (Philip K. Dick).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

whereon

(wɛərˈɒn)
adv
on what thing or place?
pron
on which thing, place, etc
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

where•on

(ʰwɛərˈɒn, -ˈɔn, wɛər-)

conj.
1. on what or which.
adv.
2. Archaic. on what?
[1175–1225]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Translations

whereon

[wɛərˈɒn] ADV (frm or liter) → en que
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

whereon

adv (obs)worauf; (= whereupon)woraufhin
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
Mentioned in ?
References in classic literature ?
As soon as they were well away, the Fox departed without taking any notice of the Woodcutter: whereon he called to him and reproached him, saying, "You ungrateful fellow, you owe your life to me, and yet you leave me without a word of thanks." The Fox replied, "Indeed, I should have thanked you fervently if your deeds had been as good as your words, and if your hands had not been traitors to your speech."
Idaeus did not dare to bestride his brother's body, but sprang from the chariot and took to flight, or he would have shared his brother's fate; whereon Vulcan saved him by wrapping him in a cloud of darkness, that his old father might not be utterly overwhelmed with grief; but the son of Tydeus drove off with the horses, and bade his followers take them to the ships.
He then bade Paeeon heal him, whereon Paeeon spread pain-killing herbs upon his wound and cured him, for he was not of mortal mould.
Sthenelus sprang from his chariot, and drew the arrow from the wound, whereon the blood came spouting out through the hole that had been made in his shirt.
She found fierce Mars waiting on the left of the battle, with his spear and his two fleet steeds resting on a cloud; whereon she fell on her knees before her brother and implored him to let her have his horses.
So saying, she wiped the ichor from the wrist of her daughter with both hands, whereon the pain left her, and her hand was healed.
"This was what she said, and we assented; whereon we could see her working on her great web all day long, but at night she would unpick the stitches again by torchlight.
The people wondered as they saw them, and asked each other what all this might be; whereon Halitherses, who was the best prophet and reader of omens among them, spoke to them plainly and in all honesty, saying:
Minerva sent them a fair wind from the West, {22} that whistled over the deep blue waves {23} whereon Telemachus told them to catch hold of the ropes and hoist sail, and they did as he told them.
The path to my fixed purpose is laid with iron rails, whereon my soul is grooved to run.
In some of the Arsacides they are used for beams whereon to lay foot-path bridges over small streams.
I have not heard whence the knowledge of your movements came to her, nor have I been able to learn any data whereon to found an opinion.