Ar‐sen″ic‐al, a. Of or pertaining to, or containing, arsenic; as, arsenical vapor; arsenical wall papers.
Arsenical silver, an ore of silver containing arsenic.
Webster's Dictionary 1913
Ar‐sen″ic‐al, a. Of or pertaining to, or containing, arsenic; as, arsenical vapor; arsenical wall papers.
Arsenical silver, an ore of silver containing arsenic.