-logy Syllabification: (-logy)Definition of -logy combining form 1 (usually as -ology) denoting a subject of study or interest:psychology 2denoting a characteristic of speech or language:eulogy denoting a type of discourse:trilogyOrigin:from French -logie or medieval Latin -logia, from Greek-logy in other Oxford dictionaries Definition of -logy in the British & World English dictionary
