See Also: thionic(medicine)
thionic(dictionary)

thionic (iou)



thionic adjective. L19.
[formed as THIO- + -IC (with -n- inserted or retained from Greek theion).]
Chemistry. thionic acid, any of a series of acids including dithionic acid and related acids represented by the formula HSO3(S)nHSO3. Freq. with prefix indicating total number of sulphur atoms, as trithionic, tetrathionic, etc.
thionate noun (Chemistry) a salt or ester of a thionic acid L19.