-ology, -logy, -ologist, -logist

(Greek: a suffix meaning: to talk, to speak; a branch of knowledge; any science or academic field that ends in -ology which is a variant of -logy; a person who speaks in a certain manner; someone who deals with certain topics or subjects)

The word -ology is a back-formation from the names of certain disciplines. The -logy element basically means "the study of ____". Such words are formed from Greek or Latin roots with the terminal -logy derived from the Greek suffix -λογια (-logia), speaking, from λεγειν (legein), "to speak".

The suffix -ology is considered to be misleading sometimes as when the "o" is actually part of the word stem that receives the -logy ending; such as, bio + logy.

Through the years -ology and -logy have come to mean, "study of" or "science of" and either of these suffixes often utilize the form of -ologist, "one who (whatever the preceding element refers to)".

The examples shown in this unit represent just a small fraction of the many words that exist in various dictionaries.

dendrologist
A specialist in the identification and classification of trees and shrubs.
deontologist
Someone who practices deontology; that is, duty or moral obligation.
deontology
The science of duty; that branch of knowledge which deals with moral obligations.

Coined by the English philosopher Jeremy Bentham (1748-1832) in 1826.

dermatologist (s) (noun), dermatologists (pl)
A physician who has been trained to treat problems relating to the skin, scalp, hair, and nails: Treatment methods by a dermatologist include medication, surgery, or the destruction of unwanted growths by freezing, burning, lasers, and radiation.
Someone who treats the diseases and structure of the skin.
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dermatology (s) (noun), dermatologies (pl)
A branch of medicine dealing with the skin, nails, hair and their diseases: Dermatology is involved with the study of the physiology and pathology of the epidermis and its appendages; such as, sweat glands, oil glands, or the outer layer of the body's skin.
The science of the medical treatment of the diseases, functions, and structures of the skin.
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dermatonosology, dermonosology
1. The classification of skin diseases.
2. The science of the nomenclature and classification of diseases of the skin.
dermatopathic
A reference to a disease of the skin.
dermatopathology
descriptive anthropology (s) (noun), descriptive anthropologies (pl)
A branch of human studies that provides scientific descriptions of individual societies of people.
desmology
The branch of anatomy dealing with the study of ligaments.
desmopathology
1. The study of diseases that affect the ligaments or tendons.
2. The study of abnormalities of ligaments.
diabology (s) (noun), diabologies (pl)
1. The study of the devil or the belief in devils.
2 Learning about the doctrine or the theories about Satan which is another term for the "devil".
diabolology
dialectologist
dialectology
Cross references of word families related directly, or indirectly, to: "talk, speak, speech; words, language; tongue, etc.": cit-; clam-; dic-; fa-; -farious; glosso-; glotto-; lalo-; linguo-; locu-; logo-; loqu-; mythico-; ora-; -phasia; -phemia; phon-; phras-; Quotes: Language,Part 1; Quotes: Language, Part 2; Quotes: Language, Part 3; serm-; tongue; voc-.