-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.

opsonology (s), opsonologies (pl) (noun forms)
The science of opsonins or the study of the process in which antibodies make cells or microorganisms more susceptible to the engulfing or covering action of phagocytes which are types of cella in the body which can surround things and swallow them; especially, white blood cells that protect the body against infection by destroying bacteria.
orchidology
The study of orchids (flowers).
organologist
One who studies plant and animal organs.
organology
1. The sum of what is known regarding the organs of the body.
2. The study of plant and animal organs, in reference to their structure and functions.
orgasmology
The scientific study of sex and sexual relations.
ornithologist (s) (noun), ornithologists (pl)
A person who is versed in the scientific study of the members of the class of Aves, including warblers, eagles, jays, owls, wildfowl, doves, etc.: The National Audubon Society, founded in 1905, has been focusing on wildlife throughout the years; especially, birds and it was named after the ornithologist, John James Audubon.
A person who specializes in studying birds.
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ornithology (s) (noun) (usually no plural)
A field in zoology which examines bird behaviors, classifications, environments, etc.: As a student in high school, Iris loved biology, especially when she learned more about the warblers in her area; so, she decided to join the National Audubon Society and to study ornithology at the university.
A person who specializes in studying birds.
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orologist
Someone who is a specialist or who is versed in orology.
orology
The scientific study of mountains.
orrhology
The study of serum, originally for the presence of antibodies but now also applied to the examination of serum for the presence of circulating antigens and, by extension, to study other body fluids for antibodies or antigens.
orthochronology
A geochronology that is based on a standard biostratigraphical succession of significant faunas or floras, or on irreversible evolutionary processes.
orthodontology
The study of irregularities in position of the teeth, and of malocclusions, and their treatment.
orthokeratology
1. A method of improving unaided vision by shaping the cornea with contact lenses.
2. The use of special hard contact lenses to treat myopia by altering the curvature of the cornea.

The lens presses on the center of the cornea; therefore, decreasing the protrusion.

orthologist
Someone who speaks correctly or who makes the correct use of words.
orthology (s) (noun)
1. The right verbal description of things: Jewel's careful orthology describing the ocean beach made her vacation experience more vivid and real for her mother.
2. Correct speaking or the right use of words: Mark's parents insisted that he should make sure that he uses orthology whenever he is talking or writing essays and letters.
The art of using words correctly.
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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-.