D defs.my
Entry 1 sense Webster, 1913

Trithionic

· Tri·thi·on·ic · IPA
01 a. Of or pertaining to, or designating, a certain thionic acid, H2S3O6 which is obtained as a colorless, odorless liquid.
  1. 1.
    Of or pertaining to, or designating, a certain thionic acid, H2S3O6 which is obtained as a colorless, odorless liquid.(Chem.)