TrithionicTri`thi*on"ic\, a. [Pref. tri- + thionic.] (Chem.) Of or pertaining to, or designating, a certain thionic acid, H2S3O6 which is obtained as a colorless, odorless liquid.
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a scrap or morsel of food left at a meal.|
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