Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

ter-

Three; having three.

[Latin ter, thrice.]

A tercentenary is the three-hundredth anniversary of a significant event. Otherwise, the form occurs mainly in chemical names, but not commonly even then: the terphenyls contain three linked benzene rings; a chemical reaction that is termolecular involves three molecules; a tervalent chemical radical has a combining power of three; terbutaline (from elements of its formal chemical name, see also but-) is a drug used especially in the treatment of asthma. The form has largely been replaced by tri-.

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