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

-logical Also -logic.

Relating to a branch of knowledge or experience.

[Formed from nouns in -logy by replacing the last letter with -ical or -ic.]

Many examples exist, of which a few are: astrological, biological, ecological, ideological, mineralogical, numerological, seismological, sociological, theological, and zoological.

Though -logical is the standard way of forming such adjectives, a few are also formed using -logic, such as hydrologic, morphologic, and physiologic. Adjectives sometimes exist in both spellings: geological and geologic; pharmacological and pharmacologic. In such cases, there is no clear distinction of sense, but the one ending in -logical is substantially more common.

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