a. [f. L. arsenic-um + -AL 1.] Of, of the nature of, or containing arsenic; pertaining to or effected by arsenic.
In many names of minerals into which arsenic enters, as Arsenical iron, nickel, pyrites.
1605. Timme, Quersit., I. xiii. 60. They … worke venemous and mortal effects, and that by reason of the arsenical mercury.
1671. in Phil. Trans., VI. 2210. The Nature and Causes of the Plague … deducing the Pestilential venom from the Air infected and corrupted chiefly by Arsenical Exhalations.
1791. Hamilton, Berthollet’s Dyeing, I. I. I. v. 80. Phosphoric and arsenical acids.
1812. Sir H. Davy, Chem. Philos., 412. The ore known by the name of arsenical cobalt.
1859. [see ARSENIURET].
1863. W. Baldwin, African Hunting, 410. Having no arsenical soap, [I] was unable to preserve the skin.
1881. Roscoe, &c., Chem., I. 541. The … employment of arsenical wall-papers … is much to be deprecated, still more is the employment of the insoluble arsenical green for colouring light cotton fabrics.
