Definition of "tyrannic"

The meek intelligence of thoſe dear eyes / (Bleſt be the art that can immortalize, / The art that baffles time's tyrannic claim / To quench it) here ſhines on me ſtill the ſame.

1790, William Cowper, “On the Receipt of My Mother’s Picture out of Norfolk. The Gift of My Cousin Ann Bodham.”, in Poems […], London: […] [F]or J[oseph] Johnson, […] by T[homas] Bensley, […], published 1806, page 579