Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

arsen(o)-

Arsenic.

[English arsenic, from Greek arsenikon, yellow orpiment (arsenic sulphide).]

Arsenic is a semi-metallic element whose compounds are poisonous; the usual adjective is arsenical. Compounds in which arsenic has a valency of five are referred to by the adjective arsenic; those in which it has a valency of three are said to be arsenious. Arsenopyrite, also called mispickel, is the main ore of arsenic; arsenolite (Greek lithos, stone) is a naturally occurring form of arsenic oxide.

Arsenal—a collection of military equipment or a place where armaments are stored and made—is unconnected, originating in an Arabic term for a place of manufacture.

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