-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.

phytopathology
1. The study of plant diseases and their control.
2. The pathology of diseases caused by plant parasites.
phytopharmacology
1. The applications of plant physiology to medical problems.
2. The study of major constituents (active ingredients) and medicinal values of plants; toxicity or hazardous components; essential oils; value-added products and possible uses; cultivation and harvesting; diseases and insects found in medicinal plants.
3. The study of the active chemicals in plants that effect our biological systems. The plants' chemical components are studied for medical and psychoactive reactions.

Many of the chemicals of plants mimic our own bodily chemicals and in some instances enhance the normal reactions that would occur; however, sometimes they block the normal functions of our neural and other cellular functions. These are factors that must be evaluated in the phytopharmacological research of plants.

phytosociologist
Someone who specializes in that aspect of ecology dealing with the origin, composition, structure, and classification of plant communities.
phytosociology
The branch of ecology that deals with the characteristics, classification, relationships, and distribution of plant communities.
picologist
picology
pilology
The study of hair; also trichology.
piscatology
The art or science of fishing.
pithecology
planetologist
1. Someone who studies the planets including their origins and compositions.
2. An expert or specialist in planetology.
planetology
A branch of astronomy dealing with planets and satellites, including their surface features, structures, chemical compositions, and atmospheres.
planktology, planktonology
The branch of biology that studies plankton, especially as the sustenance of planktivorous fish and whales.
plasmology
plebicolar (adjective)
A person who courts the favor of the common people.
plebiocologist
Someone who who flatters the common people in order to get them to follow his or her viewpoints and to get the people to take action in accordance with what is being promoted.
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-.