Meaning

noun a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and real

noun a United States territory on the eastern part of the island of Samoa

noun a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

originEtymology tree Proto-Indo-European *h₂el-der.? Proto-Indo-European *h₂elnós Proto-Germanic *allaz Proto-West Germanic *all Proto-Indo-European *swéder.? Proto-Germanic *swa Proto-West Germanic *swā Proto-West Germanic *allswā Old English eallswā Middle English also Middle English as English as From Middle English as, als(a), alswa, from Old English eallswā (“just so; as”), thus representing a…

Etymology from Wiktionary, CC BY-SA 3.0