• Webster's Revised Unabridged Dictionary
    • a Thallic (Chem) Of or pertaining to thallium; derived from, or containing, thallium; specifically, designating those compounds in which the element has a higher valence as contrasted with the thallous compounds; as, thallic oxide.
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Century Dictionary and Cyclopedia
    • thallic In chem., of, pertaining to, or containing thallium: as, thallic acid.
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