What's the difference between what and whereon?

What


Definition:

  • (pron., a., & adv.) As an interrogative pronoun, used in asking questions regarding either persons or things; as, what is this? what did you say? what poem is this? what child is lost?
  • (pron., a., & adv.) As an exclamatory word: -- (a) Used absolutely or independently; -- often with a question following.
  • (pron., a., & adv.) Used adjectively, meaning how remarkable, or how great; as, what folly! what eloquence! what courage!
  • (pron., a., & adv.) Sometimes prefixed to adjectives in an adverbial sense, as nearly equivalent to how; as, what happy boys!
  • (pron., a., & adv.) As a relative pronoun
  • (pron., a., & adv.) Used substantively with the antecedent suppressed, equivalent to that which, or those [persons] who, or those [things] which; -- called a compound relative.
  • (pron., a., & adv.) Used adjectively, equivalent to the . . . which; the sort or kind of . . . which; rarely, the . . . on, or at, which.
  • (pron., a., & adv.) Used adverbially in a sense corresponding to the adjectival use; as, he picked what good fruit he saw.
  • (pron., a., & adv.) Whatever; whatsoever; what thing soever; -- used indefinitely.
  • (pron., a., & adv.) Used adverbially, in part; partly; somewhat; -- with a following preposition, especially, with, and commonly with repetition.
  • (n.) Something; thing; stuff.
  • (interrog. adv.) Why? For what purpose? On what account?

Example Sentences:

Whereon


Definition:

  • (adv.) On which; -- used relatively; as, the earth whereon we live.
  • (adv.) On what; -- used interrogatively; as, whereon do we stand?

Example Sentences:

  • (1) With the patient in a supine position, the droplets could be positioned over the macula in the preretinal vitreous space, whereon the FTBA PO2 could be influenced by the preretinal oxygen concentration.
  • (2) The heart was the only one of all the internal organs whereon significant pathologic changes were observed during autopsy.