-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.

1. The science of darkness and the positive responses of biological systems to the presence of darkness, and not merely the negative effects caused by the absence of light.
2. The study of light pollution at night as it directly impacts biological existence which is usually specifically affected by darkness.

Plants and animals are programmed to function in a certain pattern of daylight and darkness. Alter those patterns and unhealthy things often happen.

It applies equally to organisms that are active at night and those, including humans, whose bodies require regular periods with the lights out.

Some people believe that as with all types of pollution, light pollution contaminates the natural environment and produces side effects that should be mitigated or avoided, if possible, to create a balance between necessary urban light levels and a healthy environment.

sedimentology (s) (noun) (no plural)
The science that deals with the description, classification, origins of rocks and their depositions and accumulations: Among other elements, sedimentology involves the study of rock weathering in which the hardest rocks will break or dissolve into smaller particles of mud, sand, or gravel called sediment.

Sedimentology is also influenced by movements caused by gravity or motions caused by erosion; such as, when sediment rolls or goes downhill in a landslide or when it is carried away by water, wind, or moving ice in glaciers.

A specialist in the science of earthquakes and their effects.
seismology (s) (noun) (no plural)
1. The branch of geology that involves the studies of earthquakes and their effects on the areas of the earth: Joseph is a specialist of seismology who presents information regarding the locations and magnitudes of the trembles when they happen.
2. Etymology: from Greek seismo-, "a shaking" + -ology, "study of" or "science of".
The science of earthquakes.
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Anyone who studies the nature and history of the moon.
selenology, selenological
1. The branch of astronomy concerned with the origin and physical characteristics of the moon.
2. The study of the nature and history of the moon.
3. The study of the moon, including such attributes as magnitude, motion, and constitution.
The study of landforms on the moon, including their origins, evolutions, and distributions.
Someone who studies the branch of linguistics that deals with the study of meaning, changes in meaning, and the principles that govern the relationship between sentences, images, or words and their meanings.
1. The study or science of meaning in language.
2. In linguistics, the study of relationships between signs and symbols and what they represent.
1. The doctrine of signs as the expression of thoughts or reasoning.
2. The science of indicating thoughts by signs.
3. The theory of the use of signs; especially, words, in their relation to knowledge and cognition.
semeiology, semiology
The study of signs and symbols and their uses or interpretations.
A descriptive term for or a reference to signs or symbols; for example, as they are used in speech or writing.
An expert in the science of the properties and reactions of serums, especially blood serum.
serology, serological, serologic
1. A blood test to detect the presence of antibodies against a microorganism.
2. The branch of science concerned with serum, especially with specific immune or lytic serums; to measure either antigens or antibodies in sera.
3. The branch of medicine concerned with the study of blood serum and its constituents, especially its role in protecting the human body against disease.
The scientific study of saliva; its functions, therapeutic treatment, etc.
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-.