Definition of -logy in US English:

-logy

combining form

  • 1Denoting a subject of study or interest.

    ‘psychology’
  • 2Denoting a characteristic of speech or language.

    ‘eulogy’
    1. 2.1 Denoting a type of discourse.
      ‘trilogy’

Origin

From French -logie or medieval Latin -logia, from Greek.

Pronunciation

-logy

/ˌloʊɡi/