'Upthrow' definitions:

Definition of 'upthrow'

From: WordNet
noun
(geology) a rise of land to a higher elevation (as in the process of mountain building) [syn: upheaval, uplift, upthrow, upthrust]

Definition of 'Upthrow'

From: GCIDE
  • Upthrow \Up*throw"\, v. t. To throw up. --Drayton. [1913 Webster]

Definition of 'Upthrow'

From: GCIDE
  • Upthrow \Up"throw`\, n. (Mining) See Throw, n., 9. [1913 Webster]