• Webster's Revised Unabridged Dictionary
    • n Iodal (Chem) An oily liquid, CI3.CHO, analogous to chloral and bromal.
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Century Dictionary and Cyclopedia
    • n iodal An oleaginous liquid (CI3CHO) obtained by the action of alcohol and nitric acid on iodine. Its effects are said to be similar to those of chloral.
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Chambers's Twentieth Century Dictionary
    • adj., n Iodal ī′ō-dal an oily liquid compound with properties like chloral, obtained by treating iodine with alcohol and nitric acid.
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Webster's Revised Unabridged Dictionary
Iod-, + al,cohol