| ̷ ̷ ̷ ̷+- noun
Etymology: International Scientific Vocabulary tetra- + thionic; originally formed as French tétrathionique
: the thionic acid H 2 S 4 O 6 containing four atoms of sulfur in the molecule
| ̷ ̷ ̷ ̷+- noun
Etymology: International Scientific Vocabulary tetra- + thionic; originally formed as French tétrathionique
: the thionic acid H 2 S 4 O 6 containing four atoms of sulfur in the molecule
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012