Webster's English Dictionary

Enter the word to look up:

arsenic

Cross references:
  1. element               
 
1. ar.se.nic \'a:rs-nik, -*n-ik\ n [ME, fr. MF & L; MF, fr. L arsenicum, 
   fr. Gk arsenikon, arrhenik]on yellow orpiment, fr. Syr zarni-g, of Iranian 
   origin; akin to Av zaranya gold, Skt hari yellowish - more at YELLOW 1: a 
   trivalent and pentavalent solid poisonous element commonly metallic st 
   eel-gray, crystalline, and brittle 2: a poisonous trioxide As2O3 or As4O6 
   of arsenic u sed esp.  As an insecticide or weed killer - called also 
   arsenic trioxide
2. ar.sen.ic \a:r-'sen-ik\ aj : of, relating to, or containing arsenic esp. 
   with a valence of five