arroyo (aroio)

[Sp., OSp. arrogio, = Pg. arroio, Down the arroyo , out acro the mead, By heath and hollow, sped the flying maid. Bret Harte. Arsacid, Arsacidan (är-sas'id, -i-dan), a. Of or pertaining to the Arsacidæ, rulers of Parthia from about 250 B. c., and afterward of the Part hi an empire (see Part hi an ), till A. D. 226. The Arsacid dynasty was founded by a chief named Arsaces, who revolted from Antiochus II. of Syria; and all his succe ors, about thirty, added his name to their own. branch of the Arsacidæ reigned in Armenia from about 149 B. C. to A. D. 428.