a. [f. prec. + -AL. Cf. VICEREGAL a.] Of or pertaining to a viceroy.

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c. 1728.  Swift, Two Lett. Improv. Ireland, Wks. 1841, II. 91. Burnet … has not hitherto been able to persuade his vassals … to settle a revenue on his viceroyal person.

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1868.  Mrs. Horace Mann, Life in Argentine Republic, 122. A viceroyal government was expressly created for it [sc. Buenos Ayres in 1777].

3