(chemistry) any chloride containing four chlorine atoms in each molecule

(organic chemistry) The halogenated hydrocarbon tetrachloromethane; a toxic, non-inflammable liquid, used as a solvent, in dry cleaning and in fire extinguishers.

(inorganic chemistry) The binary compound of silicon and chlorine SiCl₄.

(medicine) A condition characterized by painful muscular spasms, caused by faulty calcium metabolism

Synonym of touchy: easily annoyed or irritated, peevish, testy, irascible; also (figuratively) extremely sensitive, difficult to manage, use, or work.

(historical) A silver coin minted in Ancient Greece, valued at 1/4 of an obolus.

plural of tetartemorion

(UK) At the limit of one’s patience; frustrated or annoyed.

plural of tetanus

Of, or relating to, tetanus.