• WordNet 3.6
    • n cacodyl the univalent group derived from arsine
    • n cacodyl a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air
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Webster's Revised Unabridged Dictionary
    • n Cacodyl (Chem) Alkarsin; a colorless, poisonous, arsenical liquid, As2(CH3)4, spontaneously inflammable and possessing an intensely disagreeable odor. It is the type of a series of compounds analogous to the nitrogen compounds called hydrazines.
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Century Dictionary and Cyclopedia
    • n cacodyl Dimethyl arsine, As(CH3)2, a metalloid radical, a compound of arsenic, hydrogen, and carbon. It was first obtained in a separate state as dicacodyl, As2 (CH3)4, by Bunsen in 1837, and formed the second instance of the isolation of a compound radical, that of cyanogen by Gay-Lussac being the first. It is a clear liquid, heavier than water, and refracting light strongly. Its smell is insupportably offensive (whence its name), and its vapor is highly poisonous. It is spontaneously inflammable In air. Alkarsin is the protoxid of cacodyl. Also written kakodyl, kakodyle. See alkarsin.
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Chambers's Twentieth Century Dictionary
    • n Cacodyl kak′o-dil a colourless stinking liquid, composed of arsenic, carbon, and hydrogen.
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Webster's Revised Unabridged Dictionary
Gr. ill-smelling (kako`s bad + to smell) + -yl,
Chambers's Twentieth Century Dictionary
Gr. kakōdēs, ill-smelling.


In literature:

It is cyanide of cacodyl, and I have carried that small flask of it about with me for months.
"Raffles" by E. W. Hornung
The formula for cyanide of cacodyl is 'Me-2CY.
"Average Jones" by Samuel Hopkins Adams
The cacodylates, although formerly employed in the treatment of phthisis, should be used with the utmost caution.
"Aids to Forensic Medicine and Toxicology" by W. G. Aitchison Robertson
The dimethyl arsine (or cacodyl) compounds have been most studied.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6" by Various